Departure from Alicante Airport C gates

Hi.  I'm aware of the passport stamping procedures for residents/non residents and have worked out (!) that if you don't leave Alicante from the usual B gate (post Brexit) there is not a passport Exit stamping 'booth'.  So we left Alicante mid October and have no Exit stamp.  Can you request that your passport is taken to be Exit stamped if you are going from anywhere other than the usual B gate?  Thanks.