The main reason for this is that the drivers are in the kernel, and Fedora ships new kernels regularly. Ubuntu and many other distros will stay on the same version they initially ship with. For example if they start with 5.14.2 then even a couple years later it will be 5.14.86-200. Fedora tends to ship new major versions of the kernel within weeks of them being released upstream, so you're constantly getting bug fixes and new drivers. I prefer the ubuntu approach for servers (which is how RHEL/CentOS do it) but for desktop it's great to see it continually get better.
If you build/install the latest kernel (or a newer one) on Ubuntu I would expect a similar experience to Fedora (although Gnome and wayland versions can make a difference on some things.)
Linux laptop battery life issues are a constant, right? This has been a problem across laptop brands, across Linux distros, across many, many kernel versions. I just want to temper anyone's false expectations that they can just update from a 1-year-old kernel to one released last week and it'll fix these long-existing issues.
If you build/install the latest kernel (or a newer one) on Ubuntu I would expect a similar experience to Fedora (although Gnome and wayland versions can make a difference on some things.)