Critically you can't share to specific accounts, it's private, completely public or all registered users. Also, sharing is read-only, no collaboration allowed. So sharing sort of yes, but no collaboration say on a shopping list.
With some migrations underway it's natural to use well established community names for discoverability, but it got me thinking how I've always disliked MtF as a community name since it feels dated and "medicalizing".
Not trying to start anything here, just wondering out loud if a "Transfem" community would cater to the same needs but with less emphasis on where you supposedly came from and more focused on what we want.