Welcome to the forums @dani567!
Which "Godot Store" did you upload assets to? Godot doesn't officially have any stores or places to redistribute assets for pay, there is only the asset library, so if the place is saying it's a "Godot Store" and not the asset library, then it's unofficial.
That said, depending on the place you uploaded your assets to, it could be that it's taking some time to review as some person has to review the assets manually. I know when I uploaded to the Godot asset library once or twice it took a week or so for it to get reviewed and approved, as someone had to manually check it and approve it when they have the time.
That said though, 3 weeks does seem like a bit of a long time to be stuck in review. If you uploaded to the Godot asset library, you may want to send an email to the general contact email on the Godot contact page. If you uploaded to a different place, you may want to see if they have a contact email or similar on their webpage that you can send an email to and inquire on the status of your assets there.