Yes, I've lemon lawed a couple of vehicles in CA decades ago, I'm familiar. The specific requirements that must be satisfied in CA are available online, but there is some wiggle room where you have to know how to present and argue a few things, depending on the situation.. From what I can tell in my current case, the options are essentially to use Stellantis' buyback department and communicate directly with them (by starting at Customer Care), or get a lawyer and have them file a suit, or go pro se and file your own suit (which I wouldn't recommend). Maybe CA has some sort of other avenue, but I've never heard of such a thing.
The initial direction I was given from Stellantis Customer Care stemmed from my direct conversations (email and phone) with them regarding all of my issues (which were all well-documented with video proof for most things). I eventually simply asked them to speak to someone about a buyback (as the problems kept cropping up without resolution), and a month later, out of nowhere, I received an email that my buyback case was approved and they asked me for a bunch of documentation regarding the purchase, financing, miles on the vehicle (for mileage depletion), etc.
At the time I got the notice, I was also working with their Executive Referral manager/director who handles exactly that (I had reached out to several executives about my situation as well, and was referred to him by one of them). He and I were both unaware my case was otherwise being reviewed for a buyback by the buyback department, so at that point I essentially had been approved by his channel as well as the other. As far as I know, those are the only ways to go without either getting lawyer or representing yourself pro se (no reason to do that in CA). I had an absolute litany of thoroughly documented issues, otherwise I don't think I would have gotten anywhere on the executive side (they sell thousands of lemons every year, and probably get tens or hundreds of thousands of complaints/inquiries overall, so it presumably has to be pretty bad to get traction on the executive side).
Because the legal requirements are relatively cut and dry, if you know how to build your own case and represent yourself strongly with the in-house customer care channel, they will likely respond to you directly just as if a lawyer had made the case for you, because then they save a couple grand (or whatever it is these days) on paying your lawyer as well. If they can see your case is strong, they don't want you costing them even more by going to a lawyer, and if there's a dealer willing to do a trade assist (as can be done in some states, but maybe not all), then they may also be able to avoid the expense of giving the vehicle a branded title which kills a huge chunk of the residual vehicle value.
Some people just want a replacement vehicle, and are able to negotiate a real sweetheart deal on that as well (ie higher trim for the same price, more options, etc) as Jeep can remain in the black on both vehicles if you make the process less costly for them.
So, there are a few options, depending on the state where you live, but I've never heard of anything other than the above as far as channels to pursue.