I support the fanfic framing Suki as Zuko's much savvier bodyguard. I would read that in a heartbeat. Please just post the weirdly disjointed vignettes so I can get my fix of this premise.
Warning: You will regret this.
https://www.fanfiction.net/s/7615495/1/A-Flame-of-ThronesHere is another idea: Suki was adopted into the Royal Family when she was just a baby and grew up alongside the siblings. She is now accompanying Zuko on his quest to find the Avatar because she rather spends time with him than with Azula. Plot twist: Suki is still the leader of the Kyoshi Warriors, and from 103, the KWs become Zuko's very own Elite Mooks (you gotta admit, they complement his Blue Spirit persona very well).
I'd read it. Lavanya Six came up with a comedic premise where the Kyoshi Warriors are the victims of budget cuts and wind up working for Zuko as expert Avatar consultants, but it was just a short and didn't go anywhere with the idea. I'd enjoy the idea if just for Sokka's reaction when Zuko orders a squad of teenage girls into action against them.

Was this widely discussed in the fandom? Was it ever resolved in the comics?
I only wish there would be something - anything - Suki related widely discussed in the fandom

. But yeah, Suzuki is as close to it as it can get.
I think it got most of its actual discussion in context of whether people preferred it to Maiko. But mostly the attention was from people trying to decide if it was real, with evidence slowly mounting (at least of something on Suki's part, but Zuko is barely taking any more notice of her than he did with Mai), and nothing has come of it so far. And all of Suki's scenes with Sokka depict them as a loving couple with no doubts.
I honestly wouldn't be surprised if it started out as a misinterpretation by fans, and then Gene Yang found out about it and decided to use Kiyi to tease us all, with no intention of going anywhere with it.