I’m learning Twitch extensions so I can’t help with the technical details. But if you are wondering what is possible, I would recommend looking at the showcase which metions GIPHY](Bring GIF magic to any Twitch channel with the GIPHY Extension | Twitch Blog) and Pokémon Badge Collector
ALSO, in the Twitchdev discord there is a #developer-showcase room which is very motivational seeing the cool extensions being created.