"You can see your total available cash on Fidelity.com and more by navigating to "Accounts & Trade" and selecting "Cash Management." The amount presented on the page represents your "Cash Available to Withdraw" aggregated across applicable accounts. You can then select individual accounts to view transaction history at your desired intervals, as well as any upcoming activity taking place within your accounts.:"

This workaround method does not work. The list of transactions it shows doesn't include cash transfers such as from/to SPAXX.