Weird noises, normal?

I bought a new car in 2022 for the first time in my life. So everything is new to me. I bought a hyundai venue 1.2 motion 2022. My question to you is. Is there supposed to be random new noises as the time goes by? Cause all the garages says they don't hear anything out of the ordinary but I know my car didn't have that sound last week. Why is this happening? Is it normal. The car is only 18months young. Shouldn't the noises only start around after 5yrs or so? Just asking. I am driving a petrol mod El and she sounds like a diesel all of a sudden. Anyways. All the experts say its normal. Who am I to differ.