For the MRP overview screen. Is it possible to add an additional row that shows the adjusted/projected balances sub safety stock level?

I don't believe the workbench is customizable. I'm going to be using Analytics Workbooks to try and replace some of the screens temporarily. The tables for the workbench were opened up to workbooks in 25.2 I believe

We ended up creating many calculated then stored fields on the item master which can be reviewed after releasing a planned order. And that's where our team makes any adjustments or deletes planned order. MRP sucks not being able to customize.