You have quite a mix of things going on.

Hard accel should not have stalled the engine unless the fuel filter is very clogged or fuel pump getting weak and you never drive at high load / speed. ( RE you have always been driving at low fuel consumption so you never noticed at issue. )

The noise could be transmission pump buzz ( just like a PS low on fluid ) This could be caused by low fluid level or a filter that is clogging.

The stall can't restart is an object lesson on why I don't like push button start. Keys are tactile and their operation unambiguous removing the need built in safety controls.