@allo there is r/xmpp where some xmpp devs are lurking. Or maybe some of the xmpp-bubbles MUC? like the MUC for your favourite client? or the MUC of the XSF?
otherwise propose a Feature Request in the issue tracker of a Client.
I love XMPP, but I also tried to propose features and it was never successful so far ?♂️
If you find a fool and fail proof method let me know ?