How to enable the product tag correctly?

Not sure if this is a good place for it or no, but before few weeks I was having no issue with this, but then I change my Pixel account and I reactivate all things and do the connecting with my FB page and other things, from FB business manager also shows that its connection with my IG account and I can do shopping tag I just need to go to the mobile app and select product tag, but not it’s not showing at all. !!

how I can solve this? and if not possible how I can contact IG for this.