Qtile Cachyos creator here.
Sorry for the late response.
1) I plan to add an easy way to manage wifi networks, it will be coming soon
2) What do you mean? paru and the others should be installed by default on our ISO except if you manually untick them on Calamares
3) Yes indeed they’re located on /home/<username>/.config/qtile/config.py, only some of them are configured by default, for example launching terminal, rofi and so on
4) Qtile does not have a theme selector, you can of course modify it to your taste in config.py