I checked and it seems like in my area they only do checks that I already know the results of. Stuff like SpO2 analysis, or checks for snoring and sleep paralysis, which I don't have any problems with. I figured that I'm just drifting towards sleeping at somewhere around 6AM with the morning sunrise, and in the last years it was consistent across different time zones. I'm usually completely fine and working around this, and my workplaces thankfully had been quite loyal to me being consistently late as long as I got the job done, for which I always stayed last. It's just the stuff that is built for morning people that throws me off hard, like appointments at 9AM that I can only realistically meet by staying awake even later.