At a small company, you might well be interviewed by all of your teammates, your prospective manager, the HR person and the owner/president/CEO... in the course of one day.
At a large company, an IC might not even see their supervisor's manager's director's vice-president until they had been working for six months.
This happened to me, and it was by far my worst interview ever.
Early on in my career right after graduating I got interviewed for a Jr. Sysadmin position at a high frequency trading firm of approx ~1000 employees. The first few behavioral interviews they repeated the exact same questions, including some soft linux knowledge questions (what would you use to troubleshoot network problems lol). Then they took me for a 4 hour on-site gauntlet where they asked the same questions, again, and then I had to do a python leetcode whiteboard problem which I immediately bombed because I hardly did much coding back then. The application said "familiarity with bash/python scripting". If I remember right the problem involved binary search trees which I had no idea about at the time. I didn't know my ass from my hole.
Suffice to say after that, we had lunch. all 4 employees on my team. And all 4 employees that were in the office at the time, which was pretty much empty, because apparently nobody really went in. They gave me a really cold, wet, and soppy burrito. This was the off the mark "vibes" interview where they shot the shit and pretended to be friendly to gauge my personality. I embarrassingly had to play along even thought we all knew it was a total waste of fucking time.
Afterwards, I was shuffled into a big empty meeting room where the CEO interviewed me on screen from California. I was asked the exact same fucking behavioral soft questions down to what I would use to troubleshoot network problems, then he asked me to walk through an example. But at this point I was pretty much mentally blown up from the whiteboard problem and had no motivation to continue. My mind went blank. I could visibly tell he was upset he even had to talk to me.
Fastest rejection response I ever got.
I made time during a family emergency, and attended a call on US west coast time while living in EU (was supposed to be 9PM for me but they pushed it to 10PM right before due to recruiter messing up the invite and having it off by a week).
He didn't ask any relevant questions. He didn't seem interested. He just looked like he was doing a favor to someone that asked him to give me a shot. Original call was supposed to be 1h, then after reschedule it was 30m, but he thanked me for my time after 20 minutes. Ofc I got rejected after, even though the people before had good opinions of me.
All in all, if you're doing hiring, at least try to look interested. phew.