If you tap on the community name it will show up the instance (just underneath). Its a workaround now but at least its there.
Maybe if it makes sense, memmy can have a setting to show instance for community. It already have a setting for showing instance for user
Edit: lemmy.ml was not blocked from beehaw. Only lemmy.world. See the list of blocked instances here: https://beehaw.org/instances
Oh no I thought only lemmy.world was. Thats horrible. Luckily I created a lemmy world account and using that as my main. Also joined memmy community and discord yesterday :)