If this is a concern may I ask why this wasn't dealt with at all before covid19? I'm guessing but think it is fair to say you've probably used your desk & chair prior to this WFH covid19 but that same setup existed then as it does today.
Myself, I've been WFH for 6 years and have a nice setup in a detached garage/office. But once schools shut down, I had to migrate back into the house, sitting the dining room table in order to also take care of the kid during the workday. After a month, the old 2nd-hand kitchen chair I was sitting on actually broke, so I brought in my desk chair. By the end of the second month I accepted that this was going to be much more permanent and I ended up purchasing a new desk and chair for inside the house, much smaller than what's out in my office, but usable.