The main thing here is that Ubuntu Touch doesn't have the latest and greatest support for Wayland/XWayland. This is needed so you can run traditional desktop apps. It will come in the future and there are already works on it on the desktop side of things.
However, even with that, we can't expect for these desktop apps to magically work well on small screens with touch input.
As mentioned, uWolf is in the OpenStore which is Librewolf but made to work better on phones. It still has some quirks though, caused by the same thing I mentioned earlier. It has no clipboard support and the performance isn't as good as the native browser.