MacBook Pros are incredibly powerful laptops for their size, and the latest models can drive impressive displays. There's no problem handling 4K and the M1-chipped devices can even drive a 6K display at 60Hz (and more than one of them if you have the M1 Pro or M1 Max 2021 MacBook Pro 14 or 16).
You can usually pretty much any monitor you chooset, but there are a few things to consider. A USB-C monitor wil be the best choice since all recent MacBooks have compatible Thunderbolt 3 or 4 ports, whereas only the latest 14in and 16in Macbook Pros have HDMI ports. And, remember that USB-C monitors can also deliver power via that USB-C cable to charge your laptop.
If you’re planning to use your MacBook Pro for creative work, you'll want wide colour gamut coverage – 97% DCI-P3 or higher. You’ll also want to go for a resolution to match your laptop's. A 24in – 32in 4K monitor will generally provide a similar viewing experience to the display on one of the recent MacBook Pros.