I'm over 65 and turbo tax created 1040 instead of 1040SR even though the box is checked to create form 1040SR

If you print it out, it should print on 1040SR.  The forms are identical except that the 1040SR has bigger print and spreads out into three pages as a result of the font size.   The lines and calculations are identical.   Your tax due or refund are not affected in any way by using Form 1040 or 1040SR.

Are you using the Online version or the Desktop program?   When you print it will print on the 1040SR even if you see only the 1040 on the screen.  You automatically get the 1040SR if you or your spouse is 65 or older.  In the Desktop program you can tell it which one to print.