From this Xitter post on Aug 23 2024, it looks like public pool have about 15% of the compute power to mine a block:

https://x.com/Public_Pool_BTC/status/1826981816210710880

So if you actually want to earn rewards, you'll probably need to choose a larger pool.

My data centre S19 switched between F2Pool and BTC.com which are both smaller, but earning pools.

My income from each was about the same and profitable until May this year on an S19.