Import previous year's tax returns from TurboTax Desktop to Online?

I filled out my most recent (2022) tax return using TurboTax Online. Once I was done, I noticed that almost all my previous year's tax returns are missing  online. I assume this is because, in previous years, I used to use TurboTax Desktop instead of TurboTax Online.

I have local backups of all my previous tax returns (both as PDF and as TurboTax's proprietary file format (eg. .tax2021)) -- is there any way I can import these local tax return files into TurboTax online, so that I can conveniently see all my TurboTax returns in one place online?