Ok, this is speculative.
(And no, I don’t know how to implement this myself so please no snarky replies about this being open source, do it yourself, etc etc…)
I just came across Bitwarden Secrets Manager, I haven’t used it so know very little about it, I don’t even know if it is new or that I just missed it.
I was wondering though, is it feasible that it could be incorporated into HA as a possible alternative to the HA secrets.yaml file?
If it has file hydration capabilities and you run core/Co trainer that would already be possible.
If it has env hydration capabilities and you run core/container that would already be possible with using !env instead of !secret.
If you run OS/supervised there is (currently) not much you can do before the process is started and secrets are loaded.
I know 1password have these features, but i m not sure about biwardens capabilities (and did not find anything after a 3minute search)