basically, symlink any of the .??* files.
non-dotted files aren't meant to be referenced directly.

windows terminal settings.json is located at:
%LOCALAPPDATA%\Packages\Microsoft.WindowsTerminal_8wekyb3d8bbwe\LocalState\settings.json
# you could mklink it from here (\\wsl$\Ubuntu\home\%USERNAME%\.dotfiles\settings.json)