@jarno I have zero association with LibreWolf, but I imagine the likelihood would currently be low. There was a similar discussion about LibreWolf potentially picking up the Android Mull browser when development on that was halted, where it was noted that they would likely need somebody to step up to maintain an Android fork rather than the existing team taking an additional project.
This is probably even more true for iOS, since there's not even an existing project like Mull for LibreWolf to build from. An iOS fork would be an even bigger endeavor than continuing an established project, both because none exists currently and because iOS Firefox is fundamentally very different to the Android or desktop versions. It uses Apple's WebKit renderer, has no support for extensions, etc. Making a functional privacy fork without being able to leverage uBlock Origin, etc. would be an enormous effort.
@librewolf