Hi there and welcome to the Community, @Marco_Palmieri1 
Thank you for the feedback!
At the moment, it’s impossible to share access to specific widgets, but this idea is already on the Wishlist - Provide a client with access to specific widgets within his project.
As a workaround, you can create a project that includes all widgets for a specific location and share access to this project with the responsible person.
If you have any questions left, I’ll be happy to help 