@jdjabara, I completely agree with @beachdog. The time between surgery and the start of chemo will vary.

This website Pancreatic Cancer UK (https://www.pancreaticcancer.org.uk/information/treatments-for-pancreatic-cancer/chemotherapy/chemotherapy-and-surgery/) says "You should be given time to recover properly from your surgery before starting chemotherapy, as you need to be well enough for six months of chemotherapy. Chemotherapy may start up to 12 weeks after your surgery."

I think I hear your concern that the timing is being decided by insurance and you worry that it is not the optimal time. I would trust your oncologist and at the same time keep in contact with your insurance to make sure there are no delays beyond 13 weeks.

How's your recovery from surgery going?