No, the IS Clans do not have a working network- their HPGs were the same as the IS HPGs, the only people who did research on HPGs afaik was the Blakists.
Most Clan HPGs are NOT built on warships- consider they have more worlds in their OZ/Dominion/Alliance than they have operational warships. Additionally small warships did not have them, it was a special refit to 'important' ships- most warship RS do not have a HPG install. The 2nd MWDA book did establish A Clan HPG worked in a prefecture, but it was on a jumpship under the control of Kal Raddick & the Steel Wolves. Only a single jumpship had a operational HPG out of the fleet of jumpships the Steel Wolves controlled- was it the only HPG? possible. Were there more than one HPG in the JS? also possible. We also do not know if it STILL worked if it moved, but that was the concern of the Republic at the time b/c they did not know what caused it. Further, we have no single report afaik of a warship maintaining ANY sort of HPG link or have one operational.
The Scorpions are the only HPG network not scrambled that we know of, which is related to it's distance from the network in the IS- the HPGs are down b/c the MEDIUM changed in the Inner Sphere. Think of it like a waterbed you set a bowling ball on . . . around the bowling ball, you are going to have curves down to a drop where the ball rests but out on the edges the surface is still going to be pretty close to level. The Scorpion Empire is far enough from the epicenter of the cause of the effect that it is within the tolerances of the HPG's hardware/software to adjust.
Since the Scorpion's HPGs work, it is LIKELY the Homie's HPGs work . . . if the HPGs still exist, if the Homies are not charred cinders, and if the Home Worlds are not graveyards. BUT we have not seen the Homies and are unlikely to learn anything about them for IRL years.