wickyup is right, but not very specific.
SO you put on a non-oem CBV/BOV/whatever you want to call it. Will they deny warranty for anything? They might for a bum turbo, but they'd have to be jerks as the CBV is unlikely to cause that. There's no way that they could, for example, try and blame the BOV for a bum CV joint. They'd lose every single time. Now you replace the wastegate on the turbo, and then your turbo spins a bearing, you are in a different situation. That part, if wrong for the turbo, can cause it to overspin, which can trash your bearings. So what happens then?
A straight up honest shop would likely tell you that the wastegate could have caused it, you can either pay, or roll the dice, have them look at it to see if an oil feed line was blocked and if it was, they'll ignore the wastegate. That would be being honest to you, FCA, and their bottom line.
A shop trying to keep their bottom line and the customer happy might do something like check it out, say the wastegate is not right, we need to replace it to rule it out, bill you for it because it's not a warrantied part, put on an oem, test drive it, say it is still messed up, and then warranty it. They get paid, they keep you happy and a potential repeat customer, but if your part really screwed up your turbo, you are both ripping off FCA.
You have to pay to play. If you don't know what you are doing to your vehicle might break, you probably shouldn't be doing it to your vehicle.