You seem to want to expand all of the hash refs. in the  $added array ref. into an anonymous hash, but the keys are the same in all the  $added hash referents. So, e.g., each  'link' key's value will simply overwrite the preceding value until the last such key, and likewise for all the  'name' keys.

c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my $added = [
   { link => '/var/www/docs',  name => 'mydocs', },
   { link => '/var/www/read',  name => 'letters', }
   ];
 ;;
 my @keys = qw(link name);
 ;;
 my $hashref = {
   map { my $k = $_;  map { $k => $_->{$k} } @$added } @keys,
   };
 ;;
 dd $hashref;
"
{ "link" => "/var/www/read", name => "letters" }
[download]

Yes, it overwrites the last key,value, but this is what I am trying to accomplish:

   $success = sent( {
               to              => 'send_to',
               account         => 'to_account',
               name            => 'name',
               subject         => 'subject',
               title           => 'title',
               
               link     => "/var/www/docs",
               name => "mydocs",

               link     => "/var/www/read",
               name => "letters",
               
               type     => 'docs',
               
                   });
[download]

    link => "/var/www/docs",
    name => "mydocs",
    link => "/var/www/read",
    name => "letters",
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That is not possible, because hash keys must be unique, so there can only be one key link and one key name in each hash. However, a hash value can be a reference to an array or another hash, which can hold multiple values - for example, the data structure $added shown in the OP could be a hash value. But which data structure is best here depends very much on the sent function, which you haven't shown us. Is this a function you've written yourself, or is it from an existing module? What data format does that function expect?

Construct the hash with the static values first, then add the dynamic ones, then call the sub.

use strict;
use warnings;

my $added = [
    {   link => "/var/www/docs",
        name => "mydocs",
    },
    {   link => "/var/www/read",
        name => "letters",
    }
];

my @keys = qw( link  name );

my $success;

foreach my $send_to (@send) {

    my %send_vals = (
        to      => 'send_to',
        account => 'to_account',
        name    => 'name',
        subject => 'subject',
        title   => 'title',
        type    => 'docs',
    );
    for my $hash (@$added) {
        for my $key (@keys) {
            $send_vals{$key} = $hash->{$key};
        }
    }
    $success = sent (\%send_vals);
}
[download]

Untested because you haven't defined @send or sent() anywhere.