Can you please confirm that when you appealed to PE, you did two separate appeals, one for each PCN.
You have 33 days from the appeal rejection date to appeal to POPLA, so no rush.
Please show us the appeal rejection letter from PE for the 22/10 PCN.
Regarding the other appeal which was sent on 12/11, they have 28 days to respond as per section 8.4.1 of the Single Code of Practice (SCoP) which states:
b) requires the parking operator to respond to appeals within 28 days or, where a decision on the appeal is not concluded within 28 days, requires the parking operator to acknowledge the appeal and confirm the timeframe for concluding it, including the supply of additional information;
It's not been 28 days yet. On day 28, if you've not heard back from them, send them a message quoting Section 8.4.1 of their own SCoP.