Do you think it is harder to find meaningful friendships in your 20s/30s? Hoe can I find meaningful friendships?

I have always wished I could be a part of a group of friends having fun, sharing their lives and experiences, and growing together.
I have never really had this.
I have some friends now but I find them to be immature and sometimes difficult to deal with.

It seems like it is harder to meet new people after high school and college socially.

I did create a meetup group (on the meetup app) but so far no luck so far in starting any events.
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Anyone else?
Do you think it is harder to find meaningful friendships in your 20s/30s? Hoe can I find meaningful friendships?
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