Are deployed MACs IND-CPA?
The property you are probably looking for is whether the MACs are PRF.

With HMAC it depends on the pseudo-randomness of the hash function used. If the hash is a PRF then the HMAC is as well. However, that is not required for MAC security of HMAC, so it's not necessarily true even with a secure HMAC. See New Proofs for NMAC and HMAC: Security without Collision-Resistance.

In both of EAX and CMAC, the MAC is a particular (unique) output of the block cipher and is indistinguishable from random as long as the block cipher is a PRP and the outputs are not seen too many times to distinguish a PRP from a PRF.

Similarly, GCM outputs the XOR of a unique block cipher output with the GHASH and so is PRF as long as the block cipher is. (You also have to assume that the GHASH output is independent of the block cipher output.)

CWC has a Carter-Wegman MAC that is again indistinguishable as long the block cipher is, because it outputs a XOR of two independent block cipher outputs.