Sure. I like the Tandberg NEOs StorageLoader for smaller deployments. It has slots for 8 tapes which it can automatically change and spit out as you want.
It's pretty small as far as tape loaders go in that it only takes up a single rack unit (but it's still very deep, so you need a full-depth rack to properly store it).
It's currently sold with drives for LTO generations 6 to 8 built in (the drive comes with it and is mounted in the back but it can be removed and you can upgrade it after some years; the loader itself basically only does the job of feeding the tapes from the magazines into the drive and unloading them again after, or putting them in the mailslot for removal). It's like a tiny robot living in your server rack which I think is neat.

If you need to back up 4 TB of data, I recommend you go with LTO-7 tapes whose native capacity is 6 TB (uncompressed). LTO-6 only has 2.5 TB native capacity, so that might not be enough for you, also it's a bit old (LTO-6 was released in 2012). Note that you'll always find the compressed capacity in the marketing material but that's not very useful to calculate with unless you know the data that's to be backed up very well.

Tape capacity usually doubles every four years (more or less) when a new generation is released (to an extent it's a scheme, but technical progress does play into it as well). Backwards compatibility is limited as I said, usually drives can read two generations back and write one generation). Due to some shenanigans this does not currently hold true for LTO-8 drives (the latest gen that's widely available), which can only read back LTO-7 and LTO-8 tapes but not the older LTO-6 tapes. So you have to remember that if you have very long archival cycles to consider (thinking in decades).

LTO-8 is still somewhat more expensive, as it is the latest available gen. While LTO-9 was technically released late last year, I haven't seen it anywhere in the wild yet. They're pretty slow on the uptake, last generation it was the same and there weren't enough LTO-8 tapes for almost two years after "release" which is why they "invented" a stop-gap standard called LTO M-8, iirc, which used LTO-7 tapes but you could write 9 TB on them when using LTO-8 drives).

Long story short, LTO-7 (drive and tape) is probably your best bet in terms of economics and availability (although, if you're sure you'll be fine with LTO-6 for the foreseeable future, you might be able to save maybe $1-2k that way).

The NEOs series devices (incl. the NEOs StorageLoader) come with SAS or Fibre Channel interfaces, I recommend you use SAS, as it's cheaper and easier to get HBAs (adapter cards for your storage server) for SAS. If you use ESXi/vSphere, get an HBA that's on the compatibility list and you can pass it through to a VM to host the backup software on there and control the storage loader (not officially supported by all companies but works very well in my experience).

You do need a server to "control" and "feed" the StorageLoader and this can be pretty much anything you can put a SAS card in (as I said, incl. a VM).
I recommend you combine it with Veeam Backup & Replication which is the best backup software currently out there imo, works beautifully with VMs and a diverse range of endpoints and natively supports backing up on a tape loader as the ultimate target (you can get creative there, do hourly backups to disk and send one batch to tape every evening for example).

One caveat: Tapes must be fed at constant speed while writing or they do something called "shoe-shining" which isn't good for the longevity of the tape. You'd have to look up the exact numbers but feeding the tape directly over 1 Gbit Ethernet via iSCSI from a backup appliance with the server as a proxy... that's probably going to be too slow (if you use Veeam, it will show you what the bottleneck is during the backup process). 10 Gbit would be better but you can also fill the storage server with a few TBs of HDDs, let the agents backup there directly and then go from there to tape which would solve any speed problems and will be sufficient for small to medium-sized setups. I recommend you combine that with ReFS if you run Windows Server 2019 (which is trippy but can save a lot of space).

You can fill LTO-7 tapes with a max. speed of 300 MB/s uncompressed, which means backing up your 2 TB would take less than 2 hours. If your files compress well and your backup source can handle it, write speeds may increase up to 750 MB/s, so you will be that much faster.

The price you're looking at for the NEOs is around $4k. For the SAS HBA you can calculate about $200, add the cables and a Veeam license and a few tapes to get you started (LTO-7 tapes can be had for around $50 currently, doesn't matter which brand you buy) and you're at less than $5k all-in, if a storage server or VM host already exists. That's not too bad for total peace of mind and the level of flexibility and safety that tape backup gives you. You should get yourself a cleaning cartridge, too, as this is a highly mechanical technology and the drive needs cleaning cycle every once in a while (if you keep it in the storage loader it will use it on its own when necessary).

If you keep a few tapes in rotation (which I recommend), you'll find that some SSDs or HDDs in your org will die on you before you need to replace a tape for the first time. So the value for money is very good. You can reuse a tape many times (up to 250 full rewrites) and if you fully encrypt all your backups (which of course you do), you can sell on your used tapes later, there are companies who buy them up, so you don't have to throw them out (you can degauss them but then they're usually trash).

However, I strongly recommend that you regularly physically remove the tapes from the loader (even if you have one with 48 or more slots), as not doing so negates one of the major advantages of tape which is offline backup and off-site storage (= fully disaster- and ransomware-proof without much additional thought). Also, keep your storage server secure as the baddies are wising up to this and I know at least one recent case where they got into the storage server and issued commands from there to the tape loader to load all tapes from its magazine and overwrite them one by one (the failure here is obviously more than a technical one). Again, you can use WORM tapes (write once, read many) to prevent that also but imo that's a waste of tape.

As for the loader and drive themselves, they are mechanical, as I said, but typically very stable and come with long warranties. I've seen tape loaders run for well over a decade without major issues (most are replaced or upgraded before they break). You have to treat them well though, so data-center climate is very much their natural habitat (no vibrations or movement, not too much or too little humidity, not too much heat, no dust or corrosive climate etc.).

If space is at a premium and you don't have a rack available (e.g. at a tiny branch office), there are external LTO drives as well (without a tape loader). These are usually in the 5.25 form factor (like those old CD drives) and function not unlike old floppy drives, you pop in a single tape, write on it, pop it out again. You can technically connect these to your workstation directly. You still need an SAS interface though, because as I said, alas I am not aware of one with a more modern interface like Thunderbolt. So connecting one to a laptop is pretty much impossible (there are adapters out there but very expensive and I've no idea if they work). Bottom line, I would not recommend you get one of these. They have none of the convenience of the a tape loader where you can just drop in a handful of tapes and forget about them for a while, as they can only handle the one tape at a time (it's really just a simple drive). And they are severely overpriced for that. You can have a look at the HP StoreEver 15000 (exists as an internal or external device) which isn't bad but clocks in at $3.5k - for just $500 more you can get the full NEOs incl. drive, so it really doesn't make much sense unless you can get one cheap/used (you can find the LTO-6 version for around $1500).

Right. I hope that "little" overview helps you in some way :-)