I recently read a book by a woman who’s husband lost his long term memory and so literally lived in the present.
It proved to be very challenging for both of them.

There is a difference of setting goals and intentions and living in the future.
Setting goals and intentions happens in the present. once made the art is to do by not doing, meaning ruminating and trying to force the outcome. Instead one responds in the moment and adjusts as require. the path may not lead to the intention you were pointing to, but it will go where you are meant to be. Living in the present create the mindset were you can accept that.

Living in the future is living in the imagined dream of what might be, magical thinking and fantasy.
Living in the past is living in nostalgia, either attempting to recreate some past moment or change and fix one.