Netflow data or equivalent? I'd assume any provider to have such records, at least in the short term. It can also be invaluable in debugging network problems post-hoc.
Splunk logs of traffic. It’s pretty common at the corporate level.
At minimum? In/outbound traffic
Cause that's probably just a TB of logs per short unit of time.
Not the traffic itself, just metadata (i.e. netflow).