Also because of her powers.

It's almost as if a single person can be in three different places at three different points in time.

Time moves slower in space

Only when you’re fast, but Carol definitely moves fast (or at least can).

She aged slowly because of what Kree did to her and for Nick Fury, FFH, SI, and The Marvels didn't happened around the same time at all. FFH Happen 1 to 2 years before SI and The Marvels and either The Marvels or SI happen before it.

It's probably due to the fact when Carol was blasted with the Tesseract it slowed her aging process

Carol Danvers has longevity (like Loki and Thor). She still ages but at a very slow rate.

I wonder how they explain why hes there if hes in secert invasion and i know that agents of shields hes dead so i dont know how that will make sense? wait forget in tv not everyone stays dead forever!

He wasn’t dead in AoS. In The Winter Soldier, he faked his death. Fury was never killed off.

Nick wasn't on Earth in FFH. He only returns by Secret Invasion years later which then leads to the events of The Marvels.