  Compatibility conditions of quantum channels featuring symmetry through
covariance are studied. Compatibility here means the possibility of obtaining
two or more channels through partial trace out of a broadcasting channel. We
see that covariance conditions can be used to simplify compatibility conditions
as the broadcasting channel can be assumed to be covariant in a particular way.
A particular emphasis is on Weyl covariance and in determining compatibility
conditions for Weyl-covariant channels. The concrete examples studied include
the case of a non-compact continuous phase space and the case of a finite phase
space.
