The easiest thing to do would be a Finn AI voice line:

“Poe, stormtroopers are rising up all over the galaxy.”

Sure, he would have only had an indirect link to that, but it’s better than nothing.

EDIT: Another thought just occurred to me. Really, this would be fixing a gaping plot hole. Assumably, Lando bringing everybody to Exegol would have given the FO free reign to take control of key systems since everybody would be gone. And then our heroes would have been in the same dire straights from Episode 8. So in all reality, this is the only explanation which patches this up.