The front bumper has a piece that gets caught on every speed bump and every curb even when coming into a moderately steep inclined drive it scrapes, how can I fix this.

is gear shift if PARK?????
are front tires crushed to the curb??? we can not see that
key is not able to turn to ON, sure.
so to do that , we have to man handle the wheel.
(for sure at any curb)
hard left and hard right even 20 lbs of force. and at the same time gently wiggle the key to ON.
it will go if front tires, not down steep hill, pointing to a curb.
we can not see where you car is, so answers can get complex.
ever drive in San Francisco, I did in 1968 , thanks to MIL draft thing..
down hill parking there takes SKILLS,.
even getting out of PARK is even more hard there. that is a 2nd lock.

a shimmy condition indicates it needs a wheel alignment
best take it to an accredited front end specialist shop for a proper diagnosis of the problem

Not sure about this one, as you haven't said where the scraping comes from, left or right, front or back. But it seems that it could be one of the tires may be touching a fender or it could be a wire caught in between the wheels and the brake housing, or perhaps it may be a piece of scrap metal caught somewhere. You have no idea how many things can get caught under the car. However, if it is internal scraping, have a friend or family member to listen while you do these turns in an empty car park. You'll find the culprit in no time.

The right hand drive have the bumper poles in front of the left hand head light. when the switch is pressed to the on position, the pole extends like an antenna and it has a green light on top of it. It helps to light up the area so you wont hit the curb and scrape the rims." __________________

I wouldnt worry about it just sounds like the piece under the bumper that lets you kno wen u have pulled up too far on something e.x. curb, parking block

try it and find out

low compression

check and make sure both battery terminals are still snug or the main power wire to your starter came off

I’m happy to assist further over the phone at https://www.6ya.com/expert/john_2c7bb9c157d0baa8

check for clogged fuel filter or a clogged catalytic converter

Chances are the shop that initially replaced your bumper didn't do it right and the shoddy install left it sitting lower than it should have. Because of this, you were able to snag the bumper on the parking block. The reason you have to replace it is most likely the mounting bolt holes were torn out or otherwise damaged when the bumper was caught, and there is no longer a mounting surface to use with new mount bolts to put the bumper back on.