How to make a paid sticker extension (included with a free parent ios app)

So we have an ios app which will be launcher shortly.

This app is free with some in-app purchase.

We created a sticker extension in order to distribute our stickers easily to our users, problem is itunes connect doesn't seem to have an option to actually put a price on this extension.

After some testing with testflight i can confirm that the sticker extension is indeed embedded and distributed with the parent app.

However i failed to find any options to configure said extension in itunesconnect.


Did i miss something or is it not possible to do that?
Meaning we should ship our stickers separatly?