I can’t find the submit button to add at the end of my form

I can’t find the submit button to add at the end of my form.  I know it usually comes on there when you start a new form but I must have deleted it in the process.  Can’t find it on the list.  Thanks !

In Card Forms (Single Question in One Page Layout), the Submit button will appear automatically in the last card or field.

Hope that helps. Thank you.