The PDF is essentially a print copy....it is not something that can be imported into the tax software. "Documents" is just a cloud storage place for copies of all your tax documents.
The tax software requires a specially-formatted file that the Brokerage must provide separately, and you import it using the Investment Income section on the Wage&Income page. IF they don't have those specially-formatted files ready yet (even if the PDFs are)...then you cannot import...yet....assuming Robinhood partners with TTX to provide them.
110 PDF pages? Careful there. Online TTX will only handle 1500 stock transactions.