I don't think these studies are saying what you think they are. The incentives are clear for a PHEV that you can plug in yourself in your home. its cheaper and not hard to do.

This is a very strong prior, and with a little digging you can find out that these cars are being bought by tax credits, and then used by people who do not have access to chargers. Either because it is a rental or because it is a company car. If it is a company car, the reimbursement process for gas is easier, and why would I go through the hassle if I'm not the one saving money?

The case for PHEVs is very strong, it is a much more economical use of lithium battery capacity, is cheaper to operate, produces less CO2, and can be operated like an ICE vehicle in a pinch.

They strategically dominate EVs. Its absurd to suggest otherwise

If you have data demonstrating strong EV use of PHEVs (vs defaulting to ICE most of the time), provide it, but it is absurd to propose these suboptimal vehicles will be maximized for low emissions use based on human behavior.

It doesn’t matter how strong the case is for PHEVs if the data doesn’t conclusively demonstrate they’re being used appropriately to minimize emissions. That’s just hope, and hope is not a strategy. Frankly, PHEV tax credits should be something like revenue you have to recognize over time, only provided when proven they’re being used in the manner desired (versus at time of purchase, after which you might not ever even plug the vehicle in).

I will not provide data, your data shows it quite well enough. The mechanism by which PHEV's achieve strategic dominance is more than enough evidence.