It's not possible to pop Frequent Flyer on PS5 with crossplay because they added 20 more data-terms + the subway stations with the PS5 upgrade. Best you can do is use the free interactive map here to manually see which ones you're missing. 
Official Game Maps https://share.google/dSGibfE0qOHX3zQ4V
Official Game Maps https://share.google/dSGibfE0qOHX3zQ4V



