Just wrote a comment but Lemmy choked and I don't see it showing up so I'm going to rewrite.... Sorry if this becomes a dupe.

I haven't bought this particular chair, but have bought a few in this style for myself and friends, and I have the link handy because I posted it as an example elsewhere in thread:

https://www.amazon.com/PatioMage-Ergonomic-Adjustable-Armrest-Computer/dp/B0BLJLP7FM

These style of chair are very ergonomic, extremely breathable, and very comfortable for long periods of time. I can't vouch for this specific brand and it's quality, and the foot rest thing looks a bit gimmicky, but this mesh style chair is generally pretty high up in terms of function and comfort, while still being relatively cheap.

It's pretty comparable to the sihoo doro mentioned in another comment, but figured I'd point out there are a few similar options on Amazon and I've bought multiple in that style directly off Amazon and never had a problem - just check reviews etc.

I highly recommend these over anything with foam/flat bases and backs - your spine and body are curved, and you don't want to press yourself against flat boards for long periods of time. You get "one point of contact" and that gets uncomfortable. And foam wears out over time. Mesh conforms to your body and supports you evenly across the surface, and is way more comfortable. I've had mesh chairs for over 5 years that are still just as comfortable as the day I bought it. The foam armrests tend to be what gives out first.