I don't know for sure but my assumption is that H1B holders (and potentially green card holders, which are "permanent residents") are not excluded from this ban. As many others have mentioned here it's not easy to prevent a citizen from returning; permanent residents and visa holders can be refused entry much more easily.

I didn't write this rule though so I don't know if this interpretation is correct.

Most importantly, H1B holders are not permanent residents. It's very much a temporary. Most countries that are issuing travel bans exclude citizens and permanent residents.

This applies to H1B holders. Basically if you have a non-immigrant visa, you can assume this rule applies to you.

The rule only excludes US citizens, green card holders and their immediate families.