don’t do that.
Don’t delute the term “watch only” to mean something different than it means. It actually means that the wallet is incapable of doing anything but watching. It is a security thing where you are comfortable giving this watch only wallet to people you lack the trust in them to not spend it.
If you can’t have the ‘watch only’ security on RPA, then just be clear about that. A UI option means they can extract the private key from disk and spend your money.