On mining pools all miners get rewarded with the analogous CPU they have used.
I don't know exactly how many satoshis will be generated on every block after 2100 but I know they will be very few. Imagine splitting 1 satoshi. How? Will the bitcoin community create the nakamotos?
1 satoshi = 1000 nakamotos for example. Too dumb question, tho, since we can't know a damn thing about that era. Some say that life will end after 2100 due to loss of natural supplies.
I have not to expect that I'm still alive at that time or if I am, I'm not in crypto trading at all.
Do we think that the mining pool will put into an end? Maybe we can't tell either but unless crypto will still exist miners will still continue mining until the last block of BTC will be mined.
This is what has been discussed in the past 7 years ago
https://bitcoin.stackexchange.com/questions/4612/can-bitcoins-be-split-up-into-greater-than-a-billion-parts and it have no possibility that it will happens.