You need to pass the parameters when you call the function, not when you store the reference.
See tye's References Quick Reference.
# Here you take the reference to the subroutine
my $calls = {
A => \&print_A,
B => \&print_B,
};
# Here you call the subroutine
$calls->{ $test }->(\%config_A);
When taking the reference, you should never use parentheses.
Using Data::Dumper on %calls would show you what Perl stored in %calls.
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