It looks like they removed the "access to all sublists" in workflows from the patch notes, and now it's only expenses on Expense Report Transactions. Can confirm that's all I see in the RP too. 😞

Incidentally, I found something related to what you are saying -something related to the workflows having an issue since 2019.2. Not sure if they are trying to address that in 2020.1 or something related? https://netsuite.custhelp.com/app/answers/detail/a_id/78368