Setting wifi client limits per AP

There used to be a function to limit the number of clients for each ap to force balancing of usage however under the new controller software I can’t find it anymore.
Anyone have any clues if it still exists and where i can find it?

Running controller version 6.2.23


Set the TX power just high enough so an access point will only provide coverage in the place it needs to.

I was actually hoping to force an explicit number of users per access point rather than tamper with TX/RX numbers, I know it used to be a feature no more than 2 years ago.
In the scenario I want to use it, limiting TX/RX is not going to achieve the result I want since there will only be 1 or 2 at the most; The location is too small to make effective use of RSSI.