If I understand you correctly, you can now click within Auctiva listing & select enable ebay photos, or something like that.
I use to use that only for items that had free photos.
I missed the memo & found out recently reading other messages that with the 12 free eBay photos it is now free to do that with all your listings.
You pay extra only if you select the enlarged gallery photo for a category that doesn't give that as a free option.
It's a pain to remember to do it. During free listing offerings on eBay I've had to relist more than 1 item I forgot to add extra photos to!