I'm not 100% certain about 1.17, but from what I've read about 1.18, definitely biome placement is changing in each snapshot.
I assume you meant 1.16 in your second paragraph rather than 1.6? Either way, try it! Generate a world in 1.16, then open it in a higher version. This is trivial to do with a launcher like MultiMC, but I'm sure it can be done with the vanilla launcher as well.