It would be a great enhancement to allow for import/sync of Extensions from other profiles on the same Windows Profile. Offer a check list that the user could select from. I have multiple Edge profiles (personal, personal 2, work) and typically use all the same extensions (pwd mngr, Ad Block, etc,) across each of the profiles. PIA & a lot of extra work to have to go search out and add the same extensions over & over to each individual profile.
You would want to remove credentials from any extension that requires it. i.e. I have a different account for personal & work LastPass