The new device device care widgits that came with One UI 7 did away with the refresh option. That was the only way you could update it after going into your myfiles and reducing your storage. Samsung forgot to add the refresh option on the new widgits. Hopefully they can push an update to fix this.
As you've pointed out, the previous version of the widgets allowed users to refresh manually, which helped ensure the displayed storage data was current. With One UI 7, Samsung appears to have removed this feature.
