macvim, mactex, and M1 MacBook Air (MBA)

Question

I'm struggling with using macvim and mactex on M1 MBA.

Here is what I've done.

1. Install macvim (via homebrew, probably).
2. Install mactex.
3. Install TeXShop 4.58, Ghostscript-9.53.3-Full.pkg, and MacTeX-2020-Universal.pkg (see this).

However, on my macvim, the following errors occur.

Note: I tested x86_64 and arm64 support described at the bottom of this.

Note2: which latexmk gives latexmk not found.

EDIT: I've installed latexmk via Tex Live Utility but still the command latexmk does not work.

EDIT2: I manually adding path in ~/.zshrc as export PATH="/usr/local/texlive/2020/bin/x86_64-darwin:$PATH", which solves the problem.