Hello @Franco Orefice,
Welcome to LastPass community!
In this case, the best option is that you create the shared folder add people to it and make other or others admins for the folder. Then request to one of those admins to remove you from the shared folder in that way they will keep the folder and you will be out of it. You can find steps about giving permissions to a folder and manage users here: https://support.lastpass.com/s/document-item?language=en_US&bundleId=lastpass&topicId=LastPass/manage-shared-folders-admin.html&_LANG=enus#:~:text=to%20shared%20folder-,You%20can%20manage,-the%20users%20assigned and https://support.lastpass.com/s/document-item?bundleId=lastpass&topicId=LastPass/t_remove_user_group_shared_folder.html&_LANG=enus
Kind Regards,
Alejandra
LastPass Tech Support