Hi and welcome to the forum, mactoni.
I haven’t watched the UBports project too closely lately, but a few weeks ago there was one person working on UT for FP3. Back then IIRC they were struggling with quite a few things. Information on that can be found in the Halium group on telegram I guess.
I had tried it myself but ran into obstacles that I wasn’t able to solve. Maybe someone can pick up the work where I left it: Ubuntu Touch GSI for the Fairphone 3
My personal feeling is that right now I wouldn’t count on UT on the FP3 to arrive this year.