I’ve run Nvidia with Wayland for years and never encountered a single issue. This sounds like it’s probably just an Ubuntu issue (go figure, there’s a reason the Linux community despises Canonical). It’s worked perfectly fine for me in Fedora and Arch in Wayland, and my distro of choice nowadays is Bazzite, which is based on Fedora.
I don’t have experience with mobile Linux (still on Android), but you can emulate Android apps through Waydroid and that would (probably) work. Granted, Idk if notifications would work, but that’s an option if mobile Linux can handle Waydroid. There’s also Molly, which is a signal client that doesn’t rely on Google Play Services for notifications.
Okay, then mufasio’s comment may be more on track.
Hmm, what method did you use to back it up? It sounds to me like something got corrupted, though perhaps someone more experienced could identify a different issue. What I usually do to clone LUKS partitions is use a liveUSB (so no files change while backing up), then use cryptsetup to create a new LUKS partition on the backup drive if it’s a new drive (otherwise for incremental backups you can skip this step), then unlock both drives and rsync to the backup drive. This is also usually faster than pure cloning, as cloning would also copy the (encrypted) empty space in the partition, and for incremental backups, rsync will only copy the changed data so it’s much faster.
This would also have the benefit of preventing corruption on transfer, because rsync uses checksums to verify the file was properly reconstructed in the new location, whereas something like dd won’t have the granularity to check per-file checksums (especially if used to clone a whole encrypted partition).
I second that Nvidia is fine on Linux. I have an Asus gaming laptop with an Nvidia card that I use daily with no issues whatsoever, including in games (though do keep in mind some anticheat games blacklist Linux; that is not a compatibility issue, it is a conscious choice by the game makers, so not the fault of Linux). I recommend that anyone who is thinking about installing Linux checks their frequently played games on https://www.protondb.com/, and check any games they plan to buy there before purchasing them.
I’d also like to make a recommendation for a distro. If you want the easiest, practically no way to break it distro, I’d recommend Bazzite. You can select an option on download that includes the Nvidia drivers in the install so there are no extra steps to install them. It’s about as easy as it gets for gaming on Linux (it even comes with Steam preinstalled!). Find it at https://bazzite.gg/. It’s always what I recommend for Windows gamers thinking about switching to Linux (and choosing the KDE Plasma image bc it’s more Windows-like than GNOME). The other great part is that it’s immutable, so there is consistency across installs, it’s much harder to accidentally break, and you can roll back to a previous version in the bootloader if anything does break. Most things a person will want to install can be found in Flathub via the Discover app (or sometimes an AppImage), so most people wouldn’t really need to mess with rpm-ostree package overlays (tho they really aren’t difficult, but only use them as a last resort since it often makes updates a lot slower). I personally think that atomic distros are the most newcomer-friendly option out there. They just work, and they do so consistently. Unless you mess with package overlays, your exact root filesystem will be tested before an update is pushed, and bugs that do show up will typically be found quickly and fixed quickly due to the fact that the same bug will likely happen for everyone else (the exception is hardware-based or firmware-based issues, of course).
Just my 2 cents, having switched to Bazzite after over a decade on Linux, from Linux Mint, to Ubuntu, Manjaro, Arch, Void, Fedora Workstation, and Fedora Kinoite.
If you want the easiest experience possible with Nvidia, I’d recommend Bazzite (and go with the KDE Plasma version). It comes with everything preinstalled and consistent across installations. Plus, it’s a tank when it comes to stability; very hard to break it due to the atomic nature. Just install everything through the built in store and you’ll be fine. Installing programs is much easier than Windows in Linux due to easy software stores. Bazzite currently uses Bazaar as its software store.