[question] How do you set variable indentation per programming language

[osbm]

Hi, thank you so much for your efforts on nixvim and this neovim config.

I have couple of questions. I dont have much experience in neovim so i dont even know where to look.

I want to press tab key and move up one indentation level. For example while using khanelivim inside a nix file if i press tab it inserts 2 space characters and inside python file it inserts 4 space characters.

How can i replicate this behaviour on my config? Is it the LSPs? or some other plugin that enables this?

If you can point me to a direction that would be awesome.