Parent & Child ASIN breakage when creating International Listings

I'm having issues with selling globally

My Praent & Child ASINs are showing as fine in the UK but when pushed to my USA store, the ASINS have split and now instead of having 1 Parent with 20 variations i have 20 separate listings but on top of that, it is suppressing these listings (even though i have stock in a USA FBA warehouse) because it says there is an issue with the parent ASIN (which isn't even showing on my USA store)

Does anyone have any tips or solutions to fix this as i have a huge amount of stock on its way to the USA for Prime Day and every time i submit a ticket i am told 'please list a new ASIN' which i can't because the stock is already in the warehouse under those specific asins