Ilford Pan F Plus technical information found on page 6:
Once exposed, process PAN F Plus as soon as practical – ideally within 3 months. Exposed films should always be stored in cool, dry conditions - as recommended above.”
Here is the technical information brochure from Ilford:
For me, I find it easy to develop film and get it done soon after exposing a roll but making prints in a darkroom, that’s another story! I still make a contact print of the roll on an 8x10 sheet of paper with a contact print glass frame but then making enlargements of each negative, I just don’t do it anymore.
I guess, if I had the question/doubt in my mind as you have started your thread here, I’d take a short roll, maybe 20 or so exposures, take 5 frames, wait a month or two then repeat until the roll is exposed, develop and see if the first set look different than the last. But I do have outdated Pan F Plus film, some outdated by 10 or more years and it hasn’t affected the information Ilford puts on the edge during manufacturing.