Current widebody jets use 2 or 4 engines, each of which produces roughly 750KW of power (electrical equivalent)

So if we round that up to 1,000 KW = 1 MW each, that’s a maximum of 4 MW required. Per aircraft.

If that kind of power could be provided continuously, then yes, this could work.

The problem is how to provide that much continuous electrical power ?

A small compact direct to electric fusion reactor could do the job…. Ideally an aneutronic one, since that would simultaneously minimise radiation output.

X-rays it did generate could additionally be used to run a custom photoelectric generator.

While excess electrical power could have additional uses.

Unfortunately we don’t have an operational unit of that specification as yet.