Massive Ordnance Air Blast(MOAB),AKA "Mother OF All Bombs".
And incredibly easy,actually,if you had her power.
If there wasn't a city below them,she could've just easily blown it aside since it still had its' parachute.
Alternatively,she could just grab the still parachuting bomb,turn it on its' side,and gently place it down,because its' these two prongs...
...that actually trigger the air blast.
But also,it's not exactly effective against an armoured target,so depending on how much armour that floating platform actually had,it would at best shockwave and rattle the whole thing(maybe cause severe engine failure through broken electronics),but not outright tear a chunk off.