How much older are we talking?
There is one part that is that is the fantasy and then the other part that is reality.
The fantasy part you can satisfy by having an older fuck buddy or several if you are that way inclined.
Being in a relationship with a much older guy however is full of compromises.
You are in a different phase of your life. At 22, you are building up a career, going out until late, long haul trips, sex every day or more, etc.
Someone in their 30's is probably fine. 40's is a case by case basis. 50's you will struggle 60's will be a tough proposition for a long term relationship.
An much older man in his late 50's onwards is trying to figure out how to retire, down sizing their house, going to bed at a consistent and early time because they can't sleep past 5am in the morning, forget long haul their back is shot and maybe sex 3 times a week if they force themselves but really they'd be happy with once a week or less.