A Gnome popup window titled "Remote Desktop" that has a toggle switch labelled "Allow Remote Interaction" set to Off. It also has a button in the top right highlighted in blue labeled "Share". All I did was touch the trackpad on my Steam Controller.
https://mastodon.emmetcoughlan.com/system/media_attachments/files/116/581/027/820/851/956/original/ab8e50c2c2df9b9f.png