How to make scandinavian letters like ‘æ’, ‘ø’ and ‘å’ in manim?

I read a previous thread that said to "install the siunitx package to latex" and "replace the line (from manimlib/tex_template.tex)". How do I do this? Can't find where I should be replacing the line or how I install the package before that either.. Help would be appreciated. I'm using Visual Studios 2022 to write the code btw.