my @files = glob("*");
[download]

Here, the filenames you read in are encoded as bytes. See them as bytes:

use Data::Dumper;
$Data::Dumper::Useqq = 1;

my @files = glob("*");
for my $file (@files) {
    say Dumper $file;
};
[download]

Now, if you want to use Unicode matching semantics, you want to decode your filenames from the filesystem representation into Unicode:

use Encode 'decode';
use Data::Dumper;
$Data::Dumper::Useqq = 1;

my @files = map { decode 'UTF-8', $_ } glob("*");
for my $file (@files) {
    say Dumper $file;
};
[download]

The filesystem operations take raw strings, but your regular expression takes a Unicode string. Use the correct one in each situation.

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