Does the flap open and close like it should when the ignition is on/off?
2003 2.2hdi estate - mine 1998 Volvo 940 auto estate - also mine 2019 Citroen C3 something - the wife's PP2000 user, can help with faults / diagnostics in the Bournemouth area.
Ha! I never even knew about it to notice, I would say it is quite likely, the whole car was in great condition when I got it. Do want to pay for postage and I'll send it for free?