use strict;
use warnings;

sub foo {
    my %hash = ();
    ....
    %hash = ....  # key/values populated by some API

    bar(\%hash);
}

sub bar {
    my $hash_ref = shift;
    my @arr_of_href = $hash_ref;
    
    foreach my $i (.....) {
       ....  %some_hash initialized here for each iteration of the for loop
       push (@arr_of_href, \%some_hash); 
    }

    zzz(\@arr_of_href);   # zzz() will do something with this array
}