The median in April 2020 was supposedly around $75 (1), but it of course wildly varies from host to host. The common perception is that they significantly increased during and after the pandemic, but that as far as I know isn't reflected in more recent data (2).
A lot of the objections around the cleaning fee are that hosts often have long lists of chores they expect guests to do in addition to a large cleaning fee, and sometimes those chores are not spelled out until you check in.