It's not that 20% of those laid off were from minority groups. It's that 20% of the company was laid off and they're all from historically underrepresented groups in tech.
Since when are trans underrepresented in tech? If anything they are overrepresented
Makes sense considering both the correlations between being an autistic spectrum male and adopting a sex-incongruent gender identity, and being an autistic spectrum male and working in tech.