@Daniel Reese covered it very well, as that has been what I have heard from other NWS offices, but let's walk thru the options:
Twitter/X: Works well for most offices as long as they have the staffing to look at social media. Pictures are a plus.
Facebook: Alg makes it impossible for NWS to get real time reports.
Spotter Network: I have had more than one NWS Met at different offices tell me this isn't a viable option now because with the move of NWS Chat to Slack it no longer gets ingested into their system and they have to be logged on to a separate website to view it and they just don't have the bandwidth to do this. There is talk of Spotter Network being integrated into their new chat system in the future, so this may change. I know one NWS office removed it from their Skywarn Training slides.
mPing: To delayed for urgent reports. Reports are anonymous, so it isn't a favored method for severe weather anyway (they do like it for winter wx)
Email: Great for after action reports, but not timely enough for real time.
Ham radio: some offices love this, others don't use it. Even offices that love it may not have radio ops in office post-COVID, so it may have to be typed into NWS Chat by a net control operator.
Phone: I have heard at last one WCM say this is there preferred method now. Remember that many offices don't answer the phone, but are listing to your message as you leave it.
Not reporting: Every WCM I have talked to says reports are valuable to them. They hate it when something happens and they get no reports and yet they see the videos on social media later.