[Google Pixel 6 Pro] Morgrain:
Theoretically, yes.

It's also important to keep in mind that burn-in works cumulative, so that means only the "absolute" number of screen-on time counts. Meaning - let's say we have a fixed point, where after 5000 hours of white we'll get burn in, it doesn't matter whether you had

5000 days with 1 hour of total white usage, or

1000 days with 5 hour of total white usage, or

500 days with 10 hour of total white usage.

Burn-in is inevitable, but will probably not affect you in the lifetime of your product (1-3, maybe 1-4 years I guess). Also keep in mind that simply unlocking your phone is relatively fast in terms of "time", meaning the total cumulative hours of pixel-wear in that spot will be significantly shorter than, say, the white background of browser tabs that you scroll through for years. Even though the brightness of the pixel has significant value, meaning the brighter an OLED gets, the faster it will wear. Meaning that the fingerprint-part of the display (shining bright as daylight) will wear much faster than other pixels.

It should also be noted that organic LEDs are susceptible to outside influence, mainly heat by light (sunlight). Meaning if you place your phone in direct sunlight, the display will "age" faster.

The best thing that you can do to avoid burn-in is vary content, since that will cause a more uniform wear across the board. Meaning you should not use an OLED panel as a secondary display to display a sport channel 24/7, for example.

Practically, I only hear about burn-in when reading about used products, that are being sold to people "second hand".

The tech is getting better and better and there are certain measures taken by the manufacturers to avoid burn-in (just take a look at Google, they always went for the low brightness path with their pixels - both to save battery life (probably since that one was always bad) and to avoid burn-in).

It should also be kept in mind that ALL display technologies age. Even a "normal" LED will age in time. They stop functioning, lose color accuracy, become less bright... this whole burn-in "fear" has been blown out of proportion for years now, since I have not come across one single pixel tech that did not lose quality with time. All displays need to be replaced "short"-term (5-10 years usually). Maybe Micro-LEDs will save us, but that only time can tell. Even though, practically, often another part of a device dies, before the display becomes completely unusable (mainboard battery, some processor, maybe the RAM, faulty flash chip, etc). Meaning that because a modern device consists out of 10000 different parts - and all of these can fail - and many single failures can have catastrophic consequence for the "overall" usability of a device, giving so much focus on one single thing ("burn-in") is a bit ridicolous (not talking about you specifically here, but overall the fact that the burn-in question is arising in every forum sub I know when OLEDs are concerned, especially since Samsung started their anti-OLED marketing campaign years ago, even though they backtracked on that one, since they now want to sell OLED TVs aswell).

There are several things that are much more important to the longevity of a device, like: Decent flash drives and RAM (just look at all the old pixels dying overnight, because the storage part dies without warning - displays had nothing to do with that), easy battery replacement, good after market part availability, low repair prices. These are the things customers should worry about, not burn-in. When burn-in becomes a "real" problem, the rest of the phone will already be half-dead.