Home Sharing no longer works if your OS versions don't match (per Apple Support)

I have an intel-Mac running macOS and a M1-Mac running a different OS. I am using my older intel-Mac as a media server, and have Home Sharing turned on. I cannot stream to my M1-Mac unless I allow "guest users" (per Apple Support). I can stream to my iPad(s), my iPhone(s), and my AppleTV(s) just fine, just not between my Macs.

This saddens me, but I thought I should let the community know. I was, to say it politely, disappointment with the Apple Support response that by upgrading I had broken Home Sharing functionality (they actually stated that the different macOS versions was the cause of the issue; if your macOS versions don't match then you cannot share media)