I expect to hear who (and why) generates that kind of traffic from cloudflare owned subnets.
There may be more realistic ways to go about protecting people's SSH servers that trying to dox Cloudflare VPN users.
I think OP guessed it was probably not Cloudflare themselves scanning their ports, so I think that's what they meant by "hear who and why".
Maybe dox is too strong a word. My point is, from what I've heard, the general sentiment is that you're unlikely to get any information about customers just by sending abuse reports to Cloudflare.