newtonian mechanics - Does the engine provide the lift of the aircraft?

In the absence of the effect of natural wind, a stationary aircraft will not move without the thrust of the engine, there will be no velocity without movement, and there will be no lift without velocity. So, in this case, the engine provides the lift of the aircraft. Am I correct?

The wing has an angle of attack, so although the engine pushes the aircraft horizontally, it still produces upward force. It's like pushing an object horizontally on an inclined plane.

Gliders are powered by gravity, so in this case, gravity is the engine. So basically, the engine provides the lift of the aircraft.

A glider needs initial velocity to fly. How does this initial velocity come from? How can there be lift without this initial velocity? How can there be lift without initial velocity?