How big is engineering and product team at PhonePe, Paytm, GPay

Just curious to know how big is engineering and product team manages UPI at major UPI Players like PhonePe, PayTm, BharatPe, Google Pay, CRED, Slice, Navi, Fampay, MobiKwik, etc.

• Just product and engineering team (not counting business/ CX/ FinOps)

• Just UPI Division and not bill payments, insurance, etc.