801.03.B refers to group decisions, and an officials decision. It does not say call & confirm decisions.
This is my question - can call & confirm decisions be appealed?
This isn't going to be an answer at all, so don't get your hopes up...
It's very difficult for practically any call to get appealed to the TD. In most cases, the TD's answer should be "I dunno, I wasn't there, what do you expect me to do about it?"
A TD can't see if you committed a stance violation. A TD can't see if you improperly marked a disc. A TD can't see if took too much time. (All call-and-confirm "violations")
But likewise, a TD can't see if your disc was OB or in a hazard or above 2 meters (all group decisions).
What a TD can really do is explain the rules in more detail and answer questions.
Clarification example: A player's disc landed straddling the 10m circle. He chose not to use a mini marker and took a jump putt from behind the disc. His cardmates said "Hey, foot fault maybe? I don't know the rules, so let's ask the TD after the round. If the rules are actually X, then penalty. If the rules are actually Y, then no penalty." TDs get those questions all the time. They're not really appeals; they're just clarifications.
I think the vast majority of cases of a card talking to the TD is really just to get clarification on an issue, not to appeal a call/ruling/decision.
Appeal example: A player is playing an L-shaped dogleg hole. Their disc is in the fairway in the first half of the dogleg (before the corner). They take their stance behind the disc on the line-of-play to the basket, so it kinda looks like they're standing beside their disc relative to the fairway. The cardmates call a stance violation (call and confirm). The player says "Guys, you don't know the damn rules, let's talk to the TD after the round." The TD might say "I dunno, I wasn't there, I can't make the call" or the TD might say "The rule about line-of-play and stance is XYZ. Now that I've clarified that for you, do you people still think it was a stance violation? I wasn't there to see it, so I have to trust your judgment and memory."