The IANA describes dhcpv6 client optinon:

code 1 is clientid
So:
I have a pppoe-client named “pppoe-out0001”, i need set the clientid for the dhcpv6 client.
The “pppoe-out0001” link from macvlan interface “macvlan2389-1”.
I try to use the MAC address on the “macvlan2389_1” interface as the MAC of the DUID of pppoe-out0001.
Based on this pic, I configured mac address of “002206054F59” as a DHCPV6 OPTION.
Step 1: Determine the Type Code and Hardware Type
Type Code: 0003 (indicates DUID-LL)
Hardware Type: 0001 (indicates Ethernet)
Step 2: Get the MAC address
Assume your MAC address is 00:22:06:05:4F:59.
Step 3: Combine DUID-LL
Type code: 0003
Hardware Type: 0001
MAC address: 00:22:06:05:4F:59 (remove the colon)
The full duid: 00030001002206054F59.
But the dhcpv6 client status in searching…
The debug log:

WHY??