That could be because of a faulty import from the 2019 tax file (or not importing at all). If you marked the asset(s) as converted to personal use on the 2019 return, then that's another reason the program might not import it - though I would expect it to import it anyway.
If 2020 is your first year renting this property, then you may need to actually enter the asset in the Assets/Depreciation section.
From what I see in my desktop version of 2020, it's quite unusually for the assets/depreciation section to actually be working this early (dec 2020). Commonly the depreciation stuff isn't finalized and approved by the IRS until after the middle of January.
