> This is not a DateTime object.

DateTime says

Parsing Dates

This module does not parse dates! That means there is no constructor to which you can pass things like "March 3, 1970 12:34".

Instead, take a look at the various DateTime::Format::* modules on CPAN. These parse all sorts of different date formats, and you're bound to find something that can handle your particular needs.

I searched around in metacpan and found Date::Parse and the Synopsis seems to do the job well, at least for epoch

use strict;
use warnings;
use Data::Dump qw/pp dd/;
use Date::Parse;
use DateTime;

pp my $date = 'Sat Jun  4 22:47:31 2022';
pp my $time = str2time($date);

pp my ($ss,$mm,$hh,$day,$month,$year,$zone) = strptime($date);

my $dt = DateTime->from_epoch
  (
   epoch     => $time,
   time_zone => 'UTC',                  # fill in your timezone
  );

print $dt;
[download]

"Sat Jun  4 22:47:31 2022"
1654375651
(31, 47, 22, 4, 5, 122, undef)
2022-06-04T20:47:31
[download]

Other modules - especially the one suggested by 1nickt - might be better, I just wanted to demonstrate how to solve it by yourself.

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