In the example below, the elements of the @kk array are already array references (i.e., scalar values). No need to dereference them to arrays and then copy them into anonymous array constructors to make them array references: just use them directly.
>perl -wMstrict -le
"use Data::Dumper;
;;
my @kk = (
[ qw(aa bb cc dd) ],
[ qw(kk jj ll mm) ],
);
;;
my $i = 1;
my $arrayref = $kk[ $i ];
;;
print Dumper $arrayref;
print @$arrayref;
"
$VAR1 = [
'kk',
'jj',
'll',
'mm'
];
kkjjllmm
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