Since OpenShift 4.4, kuryr support both amphora and ovn octavia loadbalancer drivers. Kuryr should differentiate existing loadbalancer depending on its provider too
Verified on OCP4.6.0-0.nightly-2020-07-15-091743 over OSP16 (RHOS-16.1-RHEL-8-20200701.n.0) with OVN. upgrade from amphoras to ovn_octavia successfully performed as verification of https://bugzilla.redhat.com/show_bug.cgi?id=1846862 This implies that kuryr controller is able to correctly discern between amphoras and ovn load balancers to perform the upgrade.
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 (OpenShift Container Platform 4.6 GA Images), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:4196