Why Newton’s principle is now being used to describe lift produce by aircraft rather than Bernoulli’s?

Answer 1

Both principles are at work.

Bernoulli's explains why the pressure above the wing is less than the pressure below--the differential pressure provides part of the lift.

Newton's explains why the wing creating a down-draft---the air has downward velocity following---provides lift. The force that sends the air downward is provided by an equal and oppositie force upon the wing--an upward force.

There are a number of sources of lift upon the aircraft--not just the wing. Among is the pointing of the plane upward upon takeoff points the exhaust of the jet engines somewhat downward---more Newton effect.

Answer 2

Bernoulli's law is a special case under the more general Newtonian law. It's not being used "instead," you can use either and be correct.