/usr/bin/perl6 is in rakudo 2018.03-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 | #!/bin/sh
exec /usr/bin/moar --execname="$0" --libpath="/usr/lib/nqp/lib" --libpath="/usr/share/nqp/lib" --libpath="/usr/lib/perl6/lib" --libpath="/usr/lib/perl6/runtime" /usr/lib/perl6/runtime/perl6.moarvm "$@"
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