Proposal:
From now on, there will be one token male panelist on all feminist panels. At the beginning, as every panelist is introducing themselves, he says:
“Hello, my name is _____ and I do ______. I’m a feminist. And in the interest of presenting an example as a good ally, I will now do what male feminists ought to do at times like these: I will listen.”
And then he won’t speak again for the rest of the panel unless asked a direct question. But he will nod and make sympathetic noises without ever being tempted to mansplain/condespalin or try to tell us how to “fix” things.