You could well be right. I hadn't understood that when you wrote "shop overlay" you were referring to a feature within StreetComplete itself (I can't know what I don't know).

Now I've joined the dots and tried your suggestion that does seem easier and quicker and I've converted it to a bakery (I'll return at a later date to get name and opening hours, was on the opposite side of the road earlier).

Thanks for taking the time to educate me about new features I'd not tried yet, appreciated.