No Form 1098 for mortgage secured through parents

My wife and I closed on a home in December of 2020, but didn't make our first mortgage payment until January of 2021. The home was purchased via a legal, secured loan from my parents (my parents acting as the bank). They didn't provide us a 1098 last year, but since we didn't make any mortgage payments until 2021, we reported it in 2020 (completed boxes 2 and 3 with outstanding mortgage principal and origination date) but didn't claim any mortgage interest paid.

 

How should we handle the 1098 for 2021? It's easy enough to complete the info needed for the deduction using our amortization schedule, but should my parents complete Form 1098 and send to us for official documentation? The loan is clean and we don't pay PMI or have any points paid, so boxes 4-6 wouldn't apply.