They don't have a chance with the vast vast majority of women in their 20s ...unless it is a sugar baby "relationship" (or very occasionally a vulnerable young woman).
So they can look all they want.
Wanting doesn't equal getting.
I've been forced to say nothing to numerous men since my teens who assumed I was a romantic prospect for them in spite of them bring significantly older and often not even attractive.... In order not to be verbally abused.
A significant portion of the male population is "aspirational", shall we say, about their dating prospects. Delusional, un self aware, shameless and serious chancers.
I have only seen the equivalent maybe once or twice in years and years, in females so far.
Why anyone thinks it matters that they want significantly younger women,; when younger women have opportunities with younger men - who make up 50-50 of the population, is WTF.
Unless there's financial incentive, mamy 20 something women would not touch over 35, 40 at a pinch. Even then, they are far more likely to encounter and get involved with men their own age through school/college/uni/part-time jobs/sports/youth groups/friendship groups/clubs etc. etc. They have far more in common with their peers and their peers will be on average significantly more sexually attractive. They'll also have less baggage (or none).
So they can want all they like. What they get is something else entirely.