I'm running POP OS 20.04 & have installed / uninstalled VS code. When I run sudo apt-get update, I get:
N: Skipping acquire of configured file 'main/binary-arm64/Packages' as repository 'http://packages.microsoft.com/repos/vscode stable InRelease' doesn't support architecture 'arm64'
N: Skipping acquire of configured file 'main/binary-armhf/Packages' as repository 'http://packages.microsoft.com/repos/vscode stable InRelease' doesn't support architecture 'armhf'
For Ubuntu, edit: /etc/apt/sources.list.d/vscode.list. Remove any unwanted architectures from between the brackets and it should end up like this:
deb [arch=amd64] http://packages.microsoft.com/repos/vscode stable main