Using ports 5 and 6 on the PTP 820F IDU at 2.5GbE data rate

Does anyone have any experience with using ports 5 and 6 on the PTP 820F at 2.5 Gbps as the spec sheet says is supported?
The PTP 820F IDU has two ports (5 and 6) that the spec sheet says are: 2.5/1 Gbps combo interface (RJ-45/SFP)

Cisco has a cable standard called “Cisco Multigigabit” which supports 100, 1000, 2500, 5000 and 10000 Mbps speeds for instance on certain Catalyst 3850 models.
HPE calls their implementation Multi-gigabit which supports 2.5GbE, 5GbE and 10GbE over Cat5e

Has anyone gotten this to work on the PTP 820F? This is necessary to avoid using Ethernet LAG.