Why can't I understand async :(

example.rs

pub fn function_from_external_crate<F, I>(get_more_info: F) -> Vec<Action>
where
    F: FnMut(&str) -> I,
    I: IntoIterator<Item = String>,
{
    todo!()
}

async fn function_in_my_crate(conn: &Pool<Postgres>) { // <-- Currently inside an async function so
                                                       //     can't create a runtime within a runtime?
    let actions_to_take = function_from_external_crate(|id| {
        sqlx::query("SELECT info FROM things WHERE something = $1")
            .bind(id)
            .fetch_all(conn)
            .await // <-- How do I do this? We're currently within a sync clsure.
            .into_iter()
            .map(|row| row.get("info").to_string())
            .collect::<Vec<_>>()
    });
    // Confuse == sad :(
}