Tested with 4.3.0-0.nightly-2020-05-17-223233,and create PodMonitor under user namespace, Prometheus can discover/register the target
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.