It looks like Facebook will be forcing me to switch to Messenger. What are my options?

Today when I opened Messenger Lite there was a message from Meta saying " your chats will be moving to Messenger" and that Messenger Lite will stop working on September 18. I actively switched from Messenger to Messenger Lite several years ago because the regular Messenger app was draining my battery. Are there any alternatives to Messenger Lite on Android? Perhaps even FOSS?Or will my only option be to move to the old Messenger app if I want to use Facebook messenger? I have some work related groups on Messenger that would be tough to move to another platform, so Please don't just say "use Signal" or something similar.