I wrote this advice for him in 2019 when inaccessible themes came up:
https://adrianroselli.com/2019/05/a-model-for-wordpress-accessibility.html
And that was after he did nothing with the information I gave him when he commented on my Gutenberg post mortem in 2018:
https://adrianroselli.com/2018/12/lessons-from-gutenberg.html#comment-121639
6 years and no movement.
Mullenweg has never cared about accessibility. He has never cared about the disability community. Frankly, he’s never cared about the WordPress community other than its value as free labor and marketing.