I'm going to assume you mean raytracing here, as RTX is just a brand name for an architecture feature. (covering the 2xxx line and 3xxx line of cards)
First, google is your friend; https://www.nvidia.com/en-us/geforce/news/battlefield-2042-nvidia-dlss-reflex/
That answers a few of your questions, though not the raytracing bit, hence why i figure that's what you're trying to ask.
And on that note, i'm going to *guess* here, and say that if they're not implementing it it's because of what a trainwreck it was in BF5.
With the increase in players from 64 to 128, you'd probably end up with framerates tanking randomly much like it did when the 2080 was brand new when BF5 launched.
As someone who owned a 2080 back then, i can tell you raytracing got turned off *real* quick by most people as the implementation was barely noticeable visually while you were busy shooting, and it just came with a massive performance hit.
(granted, i was playing at 3440x1440 at the time, it's possible you could get playable frames by dropping to 1080p or something, i wasn't giving up the overall fidelity to find out though)
Though i'm sure the 3070+ cards could probably handle 64 players with RT on today with solid frames, i suspect they'd hit the same wall with the player cap being raised to 128, so maybe they just decided to either not implement it, or just not try to sell it as the hot feature even if you can enable it, because of the minor PR oopsie with the 2xxx series cards.
And in fairness, reflex and dlss is going to be infinitely more useful in a FPS vs ray tracing as a selling point.
Again, speculation on my part as all i could find when looking for confirmation of ray tracing not being implemented were a few speculative reddit threads, which might be where you got your "info" from.
Anything not ray tracing related is in the link from Nvidia above.