Edit: Solved according to this: reddit Obviously Void has no systemd service but I just created a script service containing a single line isdv4-serial-inputattach /dev/ttyS0 --baudrate 19200. The serial communication often crashes but runit automatically restarts it so that's fine. Also 6.6 kernel is kinda buggy but 6.10(custom compiled) and 6.1(from void's repo) work fine. Yeah and don't forget to enable the ttySx service otherwise it cannot work.

I cannot get sway to detect my tablet device on Void Linux installed on a Thinkpad X200 Tablet. Anyone knows how to fix it? I have both libwacom and xf86-input-wacom installed. It worked fine on Debian.

Now when I think about it, I don't have libwacom-32bit installed, because I'm using musl library which is 64bit only. That might be the issue considering how old my hardware is. I'm going to try to investigate but I'm going post this here anyways in case anybody knows more than me.