I can echo the frustrations expressed about social media becoming a necessity as it becomes the primary channel for communication by an institution. Both my university and student dorm use exclusively Discord to communicate events, exams, and general announcements. I don’t run Discord on my phone and due to this I have come close to missing several important things, if not for a friend letting me know. I’m not sure what if anything could be done to change this…
Run a matrix bridge, sure you still have to have an account but at least the malware client doesn’t get installed.
Same boat, I just use the Discord website on my phone. The account I created with designated e-mail address for this.
Unfortunately, e-mail notifications are kinda random. It can be like 1 day late before I receive notification that someone tagged me or whatever. They could just use regular mail at this point.