It looks as though the Jardiance manufacturer offers a co-pay card which allows the holder to pay a $10 copay for a 30 to 90 day supply of Jardiance. The qualifications for this card are that the person must be a US ( or Puerto Rican, IIRC) resident, have a prescription drug plan through a private insurance company, and not have a drug plan through a government program such as Medicare, Medicaid or Tricare. This works with the insurance, and they say the card can be renewed. I use a similar card to pay a co-pay of $10 for a 30 day supply of Eliquis- my drug plan is through my secondary insurance, federal employees BC/BS, which is a private insurance provider.
Might be worth checking out for those with a private drug plan
https://patient.boehringer-ingelheim.com/us/products/jardiance/heart-failure/savings-support/savings