Do most packages usually have a manual entry ?

Usually there are manual pages for commands, for libraries and drivers like libwacom it is less common, and they are not necessarily the same as the package name. Some packages also just have a Readme file or an HTML manual installed under /usr/share/doc or similar.

When unsure, I often just check the list of files that belong to a package, most package managers can do it. E.g. on Debian-based (i.e. apt using) distros, dpkg -L $packagename will list it, in arch based distros it is pacman -Ql $packagename.

Well, having a domain is basically documenting your IP publicly. It’s not that risky.

Sunless Sea, Sunless Skies and Stardew Valley have native Linux Support. For Stardew, even the third modding API works flawlessly for me.

For the other ones, they are reported to run well on protondb.com, which is a good place to check Linux support (not only for Steam games). The reports there usually also list, which proton version works well.

Manual firmware updates

As someone who’s work laptop no longer has Wi-Fi since the automatic firmware update, I like my updates to be manual.

I don’t use GNOME, but from what I’ve read (and from experience with other software that has extensions) they often break when GNOME updates.