@ppeter - there is not enough detail in the other forum question regarding why process-control is needed - can you please detail what fails if this is not connected, and what (if any) error messages you see in syslog in this case?
Also for network-observe etc - do these apparmor messages indicate real failures or are they just noise? ie is this strictly necessary for your snap to function?
Finally, as password-manager-service provides access to all the passwords in the user’s keyring, this is a very privileged interface and as such unless the primary purpose of the snap is to say manage this keyring, then this is not suitable to be granted auto-connect. See this historical thread for more context and a suggestion as to how to prompt the user to connect this interface manually if this is desired. Request password-manager-service auto-connection for Storage Explorer