If you don't define the `matrix_admin` in your configuration (e.g. `matrix_admin: @user:YOUR_DOMAIN`), then there's no admin by default.
If you don't define the `matrix_admin` in your configuration (e.g. `matrix_admin: '@user:YOUR_DOMAIN'`), then there's no admin by default.
You may redefine `matrix_mautrix_meta_messenger_bridge_permissions_default` any way you see fit, or add extra permissions using `matrix_mautrix_meta_messenger_bridge_permissions_custom` like this: