It's time to contact a Lemon Law attorney. I'm not sure about your state, but in PA, if a vehicle is at the dealer for repairs for a total of 30 or more days (for any number of issues), or 3 or more unsuccessful repair attempts for the same issue, it qualifies for Lemon Law protection. Even IF they actually fix the issue, it's good to be in talks with a dedicated Lemon Law attorney. I hope you're keeping records and repair invoices.
If you contact the lawyer I used, they may be able to point you in the direction of a good lawyer for your state. 1-800-LEMON-LAW or
Lemon Law Assistance for PA, NJ, NY, OH | 1-800-Lemon-Law
A good LL attorney will not charge you anything, as they can mandate (under state laws, if applicable) the car manufacturer to pay their fees on top of any potential settlement.
Kia refused to buy back my '23 Sportage Hybrid. The law can't force them to do so. However, the "partial refund" they agreed to was a hair better than a buyback and full refund of any money paid towards it. My dealer's service department said they couldn't find any problems anymore, so I told my dealer there was no longer anything wrong with it, according to THEIR service department. They bought it from me for all but $501 to pay off the lease, and it still had a clean title. Mine was 10 months old with 11,000 miles by that time. Mine spent a total of 41 days there, and I had 5 unsuccessful repair attempts for the transmission. There were other unsuccessful repair attempts for other issues, but I knew the transmission issues were sufficient for my case, so I didn't push the other issues.