KDE Connect does: https://kdeconnect.kde.org/
You can turn your phone into a trackpad/remote keyboard, as long as your desktop is running the host software. Works just fine on Wayland, in my experience.
Overall I think people are right to blame Wayland for asking developers to reinvent the wheel, but wrong to defend the first-draft nature of x11. In a truly reductive sense, Linux never really had a desktop that worked. It was a desktop server that got hacked into usability by a lot of contributors, who ended up building a big unusable monolith. Naturally, a solution that is neither big nor monolithic is bound to make people angry.
But, I think we're past the point of lamenting x11's death. It was meant to be this way, Microsoft built Desktop Window Manager and Apple rolled out Quartz; sticking with x11 just didn't make competitive sense. Wayland's "big problem" is that it asks desktop developers to go the extra mile, and I don't really think that's a bad thing to ask. Linux didn't need taller, more fragile software stacks; it needs more thoughtful integration and actual diversity in implementation. It's not a coincidence that modern applications like the Steam Deck practically rely on Wayland to deliver such a customized experience.