Man. I hate to shill, but…
I faced many of those same issues, and after a year and a half of failing to set up testing, my doctor told me to go to adhdonline.com - they offer online testing for $180, and give you results back in like a week. She’d already given me an ADHD testing referral, and she suggested that my insurer would probably reimburse me for the cost, but I have ADHD, so I never bothered with it.
It took me about 4 hours to do the test (but I did it while I was sitting through a day-long virtual meeting where I had to be present, but not ‘present’. So like, it probably won’t take focused people that long.)
And - yeah. Morally, it sucks. It’s feeding into the commodification of someone’s job and is morally kind of like using Uber or AirBNB. It’s convenient and maybe cheaper. Maybe it upsets a system that could use a little upsetting, but will likely upset it too much and have unforeseen impacts.
But it worked for me.