verified with openvswitch2.13-2.13.0-79.5.el8fdp.x86_64.rpm .

Beaker job :
https://beaker.engineering.redhat.com/jobs/5075734  pmd_auto_lb_single_rxq_test & pmd_auto_lb_multi_rxq_test

the log shows:
2021-02-07T05:58:40.619Z|00078|dpif_netdev|INFO|PMD auto load balance is enabled interval 1 mins, pmd load threshold 50%, improvement threshold 20%


before rebalance :
# ovs-appctl dpif-netdev/pmd-rxq-show
pmd thread numa_id 0 core_id 10:
  isolated : false
  port: dpdk0             queue-id:  0 (enabled)   pmd usage: 58 %
  port: dpdkvhostuser1    queue-id:  0 (enabled)   pmd usage: 39 %
pmd thread numa_id 0 core_id 38:
  isolated : false
  port: dpdk1             queue-id:  0 (enabled)   pmd usage:  0 %
  port: dpdkvhostuser0    queue-id:  0 (enabled)   pmd usage:  0 %

after rebalance : 
# ovs-appctl dpif-netdev/pmd-rxq-show
pmd thread numa_id 0 core_id 10:
  isolated : false
  port: dpdk1             queue-id:  0 (enabled)   pmd usage:  0 %
  port: dpdkvhostuser1    queue-id:  0 (enabled)   pmd usage: 80 %
pmd thread numa_id 0 core_id 38:
  isolated : false
  port: dpdk0             queue-id:  0 (enabled)   pmd usage: 85 %
  port: dpdkvhostuser0    queue-id:  0 (enabled)   pmd usage:  0 %

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 (Moderate: openvswitch2.13 security and bug fix update), 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/RHSA-2021:0497