Don't make your body work hard when sitting at a computer. Remember, good ergonomics helps.
Discussion
I use a variant of this: https://www.chairoffice.co.uk/blog/i-used-a-kneeling-chair-for-a-week-heres-what-happened/
That reduces stress on your legs but will increase pressure in your spine.
with the kneeling chair my legs are lower than 90 degrees, so if your graphic is accurate it should reduce pressure
Its not just the angle, but look, the force of gravity is different than on the chart.
But I hope that chair works well for you. When I have used them my legs feel better but my back hurts after a while.