Add option for Auto Update libraries, you can add this as optional in settings and if user enables it Memento should auto Update all library structures without user Intervention as in the Desktop Version, It should also update all Linked Libraries in Multiple Nested Levels.

Whenever someone makes any changes in library structure like Adding an Item to List Field, even from entry edit card, Memento stops syncing between devices and Update option comes, If we have multiple Link to Entry Fields and 3 or more level Link to Entry fields then we have to open many libraries and update again and again all to continue syncing properly