I very much appreciate the request and the difficulties you are facing, but IME lbry isn’t obviously something that would use the password manager service. Instead, it is choosing to do so and looking at the upstream documentation, I don’t see anything that differentiates this from other applications that request the interface and so I must vote -1 to auto-connect the interface. The user’s voice (under ‘auto-connection request considerations’) is too important to do otherwise.
Please see the manual connection mitigations for steps forward for your snap.
@reviewers - can others please vote?