Does anyone know if United is actually awarding 30 more EJets to one of the Express carriers for August delivery slots onward?

I was looking at Embraer's order book and didn't see any mention of United holding 30 additional delivery slots/options/orders after the 30th Mesa 175 is delivered.

If anyone finds anything other than baseless speculation on that rumored 30 airplane order/30 delivery slots, lemme know.