I don’t know if it’s important, but in the screenshot above you’re showing data for the page itself. You need to select your repeating group in the field I’ve marked to see if its items empty.
A tag is usually a shareable object so one tag may be related to many products. For this reason, it is reasonable to have tags field in the Product thing as a list of Tags. Then when you display tags for a product you use “current cell’s Product’s tags” as a source for your repeating group. For testing purposes, you can add tags from database console:
- Find tags you want to add and copy their unique ids to notepad.
- Find product thing you want those tags to be added to.
- Edit the product thing and enter tag’s unique ids in the field “tags” pressing “add” each time.
Of course this is not the only way to implement tags, it all depends on your use case which is not completely clear to me, so it’s just my guess this approach would be optimal based on what you’ve disclosed here.