The documents are in a dropdown menu labeled "sections" in the USCIS account that defaults to show case status, but I'm not sure it's in the online account for all application types. IR1/CR1 has it.
Of the random case numbers I added to my case tracker app, 5 of them updated today with RFE sent. They should be all on or about priority date 01/18/22. If your PD is around then, check your notices in your online accounts....