Roof connection terrace roofing to fieldstone wall

Hello everyone!

I have an acrylic glass patio roof with an aluminum wall connection profile. This was improperly sealed with foam by the previous owner against the fieldstone wall, so the sun dissolved it over the years and it also leaked rain. I am now considering how I can do this better?

Concrete on the wall with formwork to get a straight connection? -> you will never get it off again
seal with bitumen? -> the offsets of up to 3cm are very large for that
tin profile or similar that I can easily hammer on and then stick on with bitumen adhesive? -> messy and makeshift, but maybe the only option?

Thanks for your tips! Andreas

I don't know if this is professional, but maybe seal with 3-layer multifunction compressible tape? Or maybe use foam again but then cover the foam with something UV-resistant...