Just to add here, I’ve seen a couple of cockpit videos now where I’ve gotten a decent look at the ECAM and it looks like an increase of a couple of percent is normal. Usually around 78% to around 80% not a jump of 30%.
I've done a couple of flights now and one thing I've noticed is that derated climb thrust is a good 30% higher than flex. Going from 67% to about 97%. This is both using DCLB3 in the EA variant and auto-derate with the RR in a relatively light aircraft.