Why isn't the Google Channel App generating my product feed?

I’m stumped. I have GMC all set up, site claimed & verified, all necessary info is there. My website has everything it needs (refund, shipping, contact etc).

I’ve installed the Google Channel app, linked to GMC, chosen target location and language, and it shows 153 products pending.

BUT, the feed isn’t being generated in GMC.

It’s been over a week!

I’ve deleted the app and reinstalled. I’ve disconnect and then reconnected to GMC. Still nothing.

No clue why this isn’t working.

Anyone come across this before?

Sara