When you are entering income on a joint return, every income entry screen will either have a spot with both spouse’s names there, or when you click to enter a W-2, 1099R, etc. it will ask you by name which spouse it is for. You do not have to wait for the software to “ask” you for your spouse’s income.
Possibly, TurboTax will prompt you before you enter a form for the person it belongs to.
I suggest you go back to My Info and confirm your entries.
On the left sidebar select My Info
If you enter a W-2 it should ask Who does this W-2 belong to?