I did some searches before making this post but apparently I didn't use the correct terms as it looks like the exact feature was requested back in 2020: Writing in Any Position of Paper - #2 by CalebJohn
Mentioned there was the possibility of plug-in support given a new interface, perhaps? Is that still a possibility? Perhaps something akin to a JSON stored at the top of a page that gets ignored by the interface and parsed into the floating text boxes with coordinates, sizes, depth, etc?