Yes, no surprise. FCA sells 10,000 gas pacificas/mo in the US. Conversely, it sells less than 600/mo of PacHys. Given FCA's 2,500+ dealerships nationwide, that means a dealer might see 3 PacHys during the entire year. Throw in a few dealers like Gilroy, Huntington Beach, etc that sell hundreds of PacHys every year, and that means even fewer to go around for the rest of the country.
And absolutely FCA isn't making much on the PacHy. Throw in the HV battery, EV motors, regen braking, PIM, hybrid tranny, HV wiring, HV heat/coolant system, DC-DC converter, charge port, on-board charger, and engineering costs... these are all costs the regular Pacifica does not have. And they're not cheap. And considering the MSRPs are almost equal, it's obvious there are very little margins on the PacHy.
A primary reason for the PacHy's existence is to reduce FCA's exposure to fuel economy requirements, which it's already paying millions in fines for non compliance. If each PacHy reduces its penalties and credit purchases from other manufactures, selling at a loss isn't such a bad idea.
Besides low production, there's also the fact many of the gas trims can be had for much less than even the base PacHy trim. And given the target market of average families, paying $37+k is out of range for most (versus, say, a $24k gasser). But only FCA knows how it's trying to balance the much more profitable gas pacifica with profit, interest, and sales of the PacHy.
FCA fuel penalties
Gas Pacifica US Sales
PacHy US Sales