Feature Request: Share items between vaults and lock child vaults

I recently split off and moved my son's password to his own vault that he can access from his phone. This was the first time that I played with "child" vaults from the Primary vault. After setting it up and using it for a few days, I would like to request two features:

1) Share entries between vaults - ability to share an entry in the Primary vault with a child vault. For example, I would like to share the entries for my streaming services to my son's vault. This feature should only allow modifications to the entry from the Primary vault. I am aware that I can copy the entries to the child vault, but if I update the entry up on the Primary vault, this doesn't update the entry in the child vault.

2) Lock child vault - ability to completely lock a vault on a device so that no changes can be done in the vault on that device. For example, I don't want my son to be able to change the passwords on his accounts. I want to be able to completely control his vault from my device. An alternate would be to lock individual fields in an entry, for example username, password, and one time codes.