When trying to destroy an OCP 4.3 on OSP 13z9 cluster I'm hitting this issue a lot. I've had to delete via the database to recover neutron.
As 13 is a long life support and many will use it for OCP 4.2+ as that combo is supported this bug is crucial to backport to OSP 13.
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.
*** Bug 1858960 has been marked as a duplicate of this bug. ***