32MB was tested, but miners can mine whatever the block size they want from 0MB to 32MB as far as i know. Of course the best for them is 32MB but they need to update their nodes first.
blockmaxsize is the tunable for bitcoin clients. You can set it from anything from 0 to 32MB with BCH node implementations.
Sorry. I thought this was a comment to my post 😅
Yes I know. Miners will change it as needed. They can choose to mine blocks below 32MB and they probably will.
