Yeah it's actually good to do land acknowledgements, and it's good they're doing one. You should do them too. I hate to break it to you but we're not in a revolutionary phase right now, but a consciousness-raising phase.
Land acknowledgements aren't something dreamed up by white liberals who want to expunge their guilt. They're an indigenous tradition that indigenous radicals (at least where I live) practice when talking between themselves. In the context of asking colonizers to do them it's never been considered enough to just do a land acknowledgement as if by doing so you're purchasing the moral right to continue occupying. It's a destabilizing statement that a) forces the person speaking to know a single gd thing about the indigenous people whose land you occupy and b) acknowledges out loud that the land was taken without permission, which believe it or not is where we're at in terms of convincing settlers that there's actually a problem.
crossposting our comrades comment here