Are you thinking that the HSA contribution on your W-2 is in box 12 with a code of W? This code W amount is automatically carried to the screen titled "Let's enter [name]'s HSA contributions".
The first line "2023 employer and payroll contributions" is where the code W amount is carried from the W-2, and , no, you cannot change it here on this screen. You have to go back to the W-2 to change the value for the first line.
So, please come back and tell me if this answer explains your issue.