As far as the PAG oil, I attached the specifications below. However, if the system is fully charged, you should be getting cold air unless something different happened.
When the A/C is on, do you hear the compressor engage? Also, have you checked the blend air door actuator in the vehicle to make sure it is working?
Let me know. Here is a link you may find helpful:
See pic below.
Sunday, September 11th, 2022 AT 7:34 PM