Cannot select sticker as a category for my app

Hi,

I am unable to select Sticker as either a primary or secondary category for my app on the appstoreconnect. My app has a main app and an iMessage extension that revolves around the use of stickers (for iMessage).

Looks like the person in the thread below was able to solve their issue by uploading their build first before selecting a category but that did not work for me. I assume their issue was fixed from the solution because they submitted an app that was just an iMessage sticker pack while my app has a main app and my iMessage sticker portion is not the templated iMessage sticker pack but an iMessage extension that sends stickers.

Any help would be amazing, thanks!

https://developer.apple.com/forums/thread/726764