HIG doesn't specify RTL design
In Hebrew, Arabic, Persian, Urdu, and several others it's crucial to have a reversed (Right-To-Left) supporting UI and components to appear more native on screen.
RTL specifications are missing from the HIG. These are the Material Design relevant specifications for example (Scattered among different pages).
- M3: https://m3.material.io/search.html?q=rtl
- M2: https://m2.material.io/design/usability/bidirectionality.html#mirroring-layout
Apple's HIG:
Some very thorough Korean RTL HIG: