Here's the buy out section. It makes it clear there is no mitigation/offset. The extension moved the end of the contract date to Jan 31 2026.
http://tennessee.edu/wp-content/uploads/2019/04/Jeremy-Pruitt-football.pdf
Section 3.1.2
If the University terminates this Agreement without Cause pursuant to Section 3.1.1, then the University shall pay Coach a separation payment in the amount of sixty percent (60%) of the Base Pay and Supplemental Pay which would have been payable from the University Termination Date through January 31, 2024 (the "University Separation Payment''),
without any mitigation obligations incurred by Coach or offset rights atbibuted to the University following any such termination. Payment of the University Separation Payment shall be made in equal monthly installments over a period equal to the number of months remaining until January 31, 2024, with the first monthly installment of the University Separation Payment due on or before the thirtieth (30111)day following the University Termination Date. The University's obligations under this Section 3.1.2 shall not accrue interest (so long as not in arrears).