I had so much trouble with the matte filaments jamming, this is definitely a different filament, you shouldn't even think of it as PETG. I have a tuned PETG profile that I started with that had slower acceleration, slower speeds, and .4 retraction and 20 retract speed. it jammed all the time. I thought the nozzle was what was getting clogged, but it was actually heat creep causing a jam higher up in the hot end. Here's what ended up working for me.
This filament needs to be bone dry - 15% humidity required. it took 2-3 days at 55º in the drier to get it down that far. Don't bother doing any calibration until the filament is thoroughly dry. Only then do flow and Pressure advance.
Use the generic PETG profile found in either ORCA or BambuStudio. .4 nozzle. Change the nozzle temp to 220, change the engineering plate temp to 70º first layer, 65º all other layers (for other plates it's likely the same, you need higher temp to get the first layer to stick, but lower it to reduce chamber temps from rising). If you have an aux fan, set to 10% (again to keep chamber temp lower), set min fan speed to 20%. Use the standard .2 slicer setting and change the outside wall speed to 50. That's it, minimal changes from the defaults.
▶️ ▶️ ▶️ Here is the most important part, this is what stopped the jamming for me - crack the door or vent to top - if the chamber temp rises above 38º it will jam (34-35º is ideal). I could successfully print small cubes, but once I started larger prints, it would jam about an hour in. once I figured out it was heat creep and not the nozzle, I haven't had a failed print.