I'd probably look up the equivalent shop version and use those points as a guideline. Do you have the WW app?
Asda chosen by you deep fill steak and gravy pasty puff pie is 14pp for 184g
Feasters all steak pie is 16pp for 233g
Morrisons steak pie is 11pp for 169g
Pukka pies all steak pie is 13pp for 174g
So I'd suggest maybe weigh your portion and find something equivalent!