After a couple of popular TV show showed wealthy people eating outdoors, "outside rooms" became a fashion statement. Fast Fashion in clothing is extremely hard on the environment, and the outdoor furniture version is no different. It's pretty much all short-cycle artificial fabric full of artificial foam.
If you have, or can find, *any* sort of outdoor chair (or indoor chair that won't be hurt by rain/dew/sun) that fits you comfortably without any cushions, that is awesome. I, for one, am not so lucky. All my outdoor furniture is a compromise for my body, as is a friend's who I often dine outdoors with. When she replaced her cushions due to them wearing out after 15+ years, she bought a matching throw cushion for me to put behind me so that I'd be able to sit with them to eat. "Too deep" is common for me and "back support" in exactly the wrong place or simply totally lacking is equally common, but both problems can be fixed with the right size and shape of cushion behind me.
There's a whole thread full of cool ideas of how to refurbish outdoor chairs that had some sort of strapping on them. The OP was amazed at all the great ideas and decided to try more than one of them.
https://permies.com/t/178119/suggestions-refurbish-older-lawn-chairs
At the very least, permies know they can build better than what the fashion people insist you need in order to "keep up with the _________ " . Learning to ignore ads and subtle "promotion" is a life skill many of us struggle with. Many permies are winning that struggle!