ipad and creator studio

Hello I've run into an issue that jas me pulling my hair out. Creator Studio and Facebook Buisness Suite will only let me choose images from my camera roll to set up posts. This is an issue because my watermark can only be linked via the lightroom mobile option as "export as" which does not allow me to save to my camera roll. There is an option to save to camera roll but it will not attach the watermark. So I'm having to basically dropbox myself images with watermarks from LR and then save them to my camera roll that way since when selecting an image to upload in the publisher my only choosable options are "Camera Roll & Live Photos"

How do I remedy this?