I totally agree, but firmware fix is way above my abilities.
If there is a firmware that shows Arabic correctly, there is no reason Hebrew won't be the same.
RTL text come with special characters that tell the device this information, so basically I can't see why it won't work the same (although, if I remember correctly there are different characters to Arabic and any other rtl language).
I didn't saw anyone that actually have rtl notifications and in any case, I made it for the amazfit Bip..