Did you post the NTK?
Anyway, from your narrative posted on 12 April:
I went to visit the neighbour yesterday [11 April 2025] as they have had an unexpected short stay in hospital, and was passed the post that had been accumulated over the last 2 weeks since seeing them, none of which should be important as all necessary bodies have been notified of the new address.
There was a PCN from Parking Eye, issue date of 4th April for an event on 1st April which had been sent to the old address.
So, issue date 4 April. Deemed given 8th.
Parking charge event, 1 April.
Therefore IMO it has been given within PoFA timescales and the keeper's got until 6 May to submit any 'appeal'.