The general Subscript rules apply providing shortcuts for lists of literal strings, with and without interpolation.

my %h = oranges => 'round', bananas => 'bendy';
dd %h<oranges bananas>;
# OUTPUT: «("round", "bendy")&#9252;» 
my $fruit = 'bananas';
dd %h«oranges "$fruit"»;
# OUTPUT: «("round", "bendy")&#9252;»