That buoy is displaying a legit pressure fall. Looking at that, IR, and most importantly radar, it looks like Idalia is trying to take this latest mesovortex and turn it into the beginnings of an inner core.
The longer the convective towers can fire absent disruptive shear and dry air intrusion, the more likely it’ll be able to go from mesovortex in a broader circulation to nascent inner core. Seeing convection try to rotate upshear on radar is a meaningful piece of data.