Thanks for the interest. So far, I've only had one (or maybe two) other person(s) ask about iOS support, so I haven't really looked much into it so far.
I could set up a donation page (like GitHub sponsors), but my guess is that it would receive nowhere near the amount of an Apple Developer account ($100 a year).
I also don't have an iPhone or Mac. I should be able to get around the Mac by using a VM (I've done it before), but it is a pain.