Exactly bro.... That transition between parking brake > gear still in P > brake pedal and shifting out P is when the weight and load transfers to transmission sort of locking it in P. Its always better to: Brake > Release Park brake > Shift gear. The key is brake pedal first thing in all automatic cars, that is why all Push start cars too dont start without brake pedal.
Even when parking the car to rest, its a vice versa process, means after all the gear into P and parking brake and everything, the last thing should be removing foot from main Brake Pedal else its back to square 1 of putting force/weight of car resting on transmission.
First most thing on driving seat of an Automatic car: Press brake pedal (before everything else)
The last most thing getting out of an Automatic car: Release brake pedal (after everything else)
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