The Nvidia Drake model (T239) that's been leaked (also by a leaker who's gotten multiple things correct) and is listed as NVN2 in an Nvidia leak (NVN is Nvidia's internal name for the Nintendo Switch) is way too powerful for a "Pro" model. That thing is like 7-8x more powerful than the current Switch.
Yes alongside DLC 2 could stray into the first quarter of 2024. At almost 7 years old it would be too late for a Pro model. If they release a new device with the T239 or another chip with a newer architecture but still call it "Switch Pro" it's just Switch 2 with a different name. That's too radical a change in hardware to be considered similar to the New 3DS, PS4 Pro or One X.