Every mortgage statement I've ever received from any lender, shows the interest paid year-to-date. So the December statement will show you the total interest paid on a particular loan.
The 1098 may or may not be required or sent. But the bank has to report the interest they received from you, as income. So there "is" a record (usually in multiple places) that you paid the interest, and that the lender received the interest.
Regardless, interest paid on mortgaged rental property is reported on line 12 of the SCH E. If entering data in step-by-step mode (versus forms mode) you enter it in the program "as if" you received a physical 1098.
