It isn't, it's just different. I use NixOS because of stupid easy rollbacks, which is great for experimenting in production, and its declarative nature, which is great in a server setting.
Just keep using the layout you're used to. I'm Brazilian too, but I've lived abroad my whole life, and US layout is what I'm most used to (even though I've never lived there, funny enough). When I'm on other keyboards, I just switch the layout to US International, and stop looking at the keyboard.
The deck shines with its default OS, and while installing other OSs is possible, it's probably not gonna be a great time. Though you may not need to, as the deck's desktop mode is pretty capable for light browsing/working. Especially now with the addition of the nix package manager.
As for the dock stuff, you're not wrong, but a dongle would work just well as a dock, so if you want to wall mount it, you just need to leave enough space to hang a dongle to it.
Overall, a beelink would probably work best, and give you fewer headaches if a desktop is what you're looking for, but the deck has the portability/handheld factor. It's really gonna be up to your needs, which one is better.
https://qz.com/tsmc-blamed-a-lack-of-skilled-us-workers-for-delays-at-1850662936