Is this documentation section correct? https://atmos.tools/cli/configuration/stores this one suggest type for store,this one https://atmos.tools/stacks/sharing-state/stores mentions configuration should use backend? Do I understand correctly that the Secrets Manager is not supported, only Parameter store?

As designed it was not intended for secrets because we have not audited that atmos will not emit values in output

understandable, thanks for the headsup, I'll hack with an !exec for now for my usecase

Yep, best for now.