I've had the S23 ultra for a month or so and I have tried in the interim to get SFC 2.0 to work to no avail.
I have a 3rd party charger with these specs:
(PDO)5.0V==-3.0A or 9.0V=3.0A or 12.0V--3.0A or 15.0V-3.0A or 20.0V--2.25A (PPS)3.3-11.0=-3.0A or 3.3-16.0V--3.0A
I connected my Note10+ to it and it showed SFC 2.0. I connected my S23 Ultra... Only standard SFC.
Since I didn't know officially how many Amps the cable supported I entertained the possibility that maybe the newer phone has higher "demands" on what cable it allows to SFC 2.0 for maybe safety reasons or whatever so I went and got a 100W 5A cable. Connected my Note10+ to it. SFC 2.0 comes up. Connect my S23 Ultra... Standard SFC... AGAIN!!!
I did suspect they might have changed something but the one I got supposedly does 11V
(PPS)3.3-11.0=-3.0A or 3.3-16.0V--3.0A
it even seems to be a "clone" of Samsung's EP-T4510 charger since the 3rd party one claims the same model number (that probably makes it more shady than reliable but still).
I know the charge difference is minimal and I can't say I "need" another charger but it's really... reaaaaally bugging me on not managing to make the sfc 2.0 come up even for a moment... It's just really doing my head in... I am trying to fight the urge to not go and buy samsung's official EP-T4510 which was why I was trying to see if there was possibly any other issue on not working (because if I blew even more money to get that charger only for the S23ultra to refuse to again sfc 2.0 would probably lead to me driving to the nearest cliff).