https://support.apple.com/guide/mac-help/use-your-keyboard-l... - Keyboard navigation

https://support.apple.com/guide/mac-help/navigate-your-mac-u... - Full Keyboard Access (accessibility feature, goes beyond just tabbing between elements)

It's annoying that tabbing between UI elements is off by default on macOS. It's one of the first things I turn on with a new mac.