Easiest way to fade between two signals

Hi. Really looking for some type of simple plug in that will let me manually fade between two stereo tracks. Or I can set up in cubase 11. Thanks

Do you mean a DJ style crossfader?

There are several plugins available that allow you to crossfade between two input signals, e.g. MRatio and Transmutator.

Another idea might be to put the second audio event temporarily on the same track as the first audio event. Then move them to overlap and apply a crossfade. You can use the crossfade editor to set up the details of the fade.
Afterwards move the second audio event back to its own track. Both events ought to keep their fade-out and fade-in.