if it was a nuclear explosion its a comparatively tiny nuclear explosion, in the realm of the M65 atomic cannon from ye olden nuke days

its a fuckin massive conventional explosion, but what makes it so visually impressive is the amount of material burning up there making that massive mushroom cloud
theres a difference between detonating a metric fuckload of explosives all at once which makes a massive shockwave, and then ground zero also still going after the fact
so theres a huge explosion there, followed by literal tons of explosive material burning off, adding to that mushroom cloud

without that aspect you get something more like the 2020 beirut explosion, where a ton of explosives went off at once, decimating explosion with an even more horrific shockwave, no massive plume of fire because it basically all went up at once

i dont really understand why so many people think thats nuclear just because theres a mushroom cloud
theres a 600 foot tall cooling tower a town over from me, its still attached to a coal power plant, but because its a cooling tower people presume its nuclear