I suggest you go back to payroll and let them know you are in need of a corrected W-2. You need this information reported to you on Box 12, and per the IRS instructions, they must report it.
You can provide the IRS 2024 General Instructions for Forms W-2 and W-3. Per page 13 of the instructions, you (meaning the employer) "must report all employer contributions (including an employee's contributions through a cafeteria plan) to an HSA in box 12 of Form W-2 with code W."
