Beehaw is blocking lemmygrad, they’re federated with lemmy.ml which is federated with lemmygrad, though.
I’m a member of the lemmygrad instance and I don’t think I’ve see any content from beehaw, so you should be good over there.
Edit: Okay, I can confirm you cannot see any content from users in a blocked instance. I just looked at this thread from slrpnk.net and you cannot see my comment. And I also just read that you didn’t want to join beehaw. What’s wrong with beehaw?
For what it’s worth, lemmy.ml is growing very quickly, and while lemmygrad is also growing quickly, people seem to want to stick to communities in their local instance. As lemmy.ml continues to grow, you should see less content from lemmygrad users as we become more diluted here.