Initially, we needed Varnish6 under component so as to have it tested while still maintaining Varnish5 in production. We now use Varnish6 in all our production
cache hosts. With this shift, we aim to cleanup the old and unused Varnish5 packages and have component available for future experimental Varnish versions.
Similar work has been done tasks : T261632, T300247, and T300164