Moonfin - can we get pre-rolls before TV shows?

I'll post to the Moonfin Github if need be, but I'm curious if there's a way to get pre-rolls before TV shows? Before a show like Bob Newhart, I like to play an era-appropriate network bumper.

Jellyfin's native web interface will play the pre-rolls I have setup for TV shows, but I already know that the native Android TV client doesn't. Was testing Moonfin and noticed it doesn't either.