Non residents can (for now...) enter as tourists so long as not coming in from a group A country. Obviously it's a massive pain to do 14 days of quarantine (at least) just for a 90 day stay, but I would imagine some extensions of tourist stays will continue to be entertained as they were before the non resident shutdown. And surely there is a fair chance Macau runs become possible by end of year... maybe...
For the full dependent visa the genuine relationship thing is aimed at sham marriages. They ask for photos etc. to prove even with a marriage certificate. No “long term relationship” recognition concept at all.