I'm on 1.21.1 and playing with Cobblemon. Love the feel of the towns, but it causes like 12 pokemon centers to appear in one town. While more then one is kind of nice, way too many spawn. Not sure if I should go to the cobblemon page too but it seemed like a village overhaul thing. Hope you're willing to give a look at some point if possible.

Ok I took a look at Cobblemon source code and apparently they for some reason put their poke center houses at 150 weight while all the other houses are at 2 weight, resulting in many Pokémon centers to spawn in. This in conjunction with Lio's Overhauled Village roads which are 4x the size of vanilla roads will lead to pretty much guaranteed poke center house spamming. I would bring this issue up with the Cobblemon devs as 150 weight for a house is very excessive.
souce code

Yeah, I've noticed removing your mod did not totally remove the issue. My bad, I guess I thought cobblemon might have a cap sense I hadn't seen more then two. But I am now encountering dozens of them still.

Yeah, i mean they might've done it to ensure their pokecenter was always spawned in though at that point setting the weight to 10 would probably ensure it anyways. I'm closing this as not planned, anymore issues feel free to re open.