Yeah, or you can go to developer options, look under hardware acceleration and enable force dark mode. That way, Messenger Lite is as dark as the OG Messenger and it just works.Sorry for the problems with my Messenger Lite dark mode app on Android 12 and up. I'm still on Android 11, but here is an updated version (313), cloned using a different app, so maybe it'll have less problems this time.
https://www.reddit.com/r/androidapps/comments/lou0fc/_/hom5u2z