Is there a way to make MP’s actually really private ? Where an admin can not access other members MP’s unless there’re invited with a flagging or a tag ?

Yes, check Discourse Encrypt (for Private Messages)

Rendi i MP effettivamente privati

Falco (Falco) 3 Dicembre 2020, 3:12pm 2

Argomento		Risposte	Visualizzazioni
How to make it so that admins are not able to view private messages of their users? Support	12	1945	Settembre 8, 2022
How alert if admin/mods read users PM? Support	10	1257	Marzo 16, 2022
Are PMs truly private and not crawlable? Community Building	4	1292	Agosto 16, 2020
Can I view private messages as an Admin? Support	13	5198	Settembre 14, 2020
Can true private messages be implemented? Feature	29	5694	Marzo 9, 2020