Frequently used scripts list optgroup doesn't get read by some AT

[marisademeglio]

The last used script does show up at the top. However, the caption above it” “Frequently used script” is not read by Jaws and Narrator. NVDA does read it.

[marisademeglio]

Screenreader support for <optgroup>, used to distinguish the group of frequently-used scripts, is poor
https://a11ysupport.io/tech/html/optgroup_element