Intel is a bit annoying at picking and choosing which instruction sets get included in the processes. Maybe they just removed it for the 10th gen mobile? I wonder if they will be included in the 10th gen desktop, if that is ever going to be released.

I've only looked at a few of the mobile and desktop 9th gen, looks like its only included in some of the higher end models.

Mobile:

i5-9300H - no

i5-9400H - yes

i7-9750H - no

i7-9850H - yes

Desktop:

i3-9300 - no

i5-9600 - yes

i7-9700 - yes

Maybe they're limiting it to Xeon products, since Intel seemingly has a quota of asinine market segmentation decisions per generation.