Force gas part of hybrid to run?

It may or may not be a waste of time and money, but I decided to paint the exhaust system of my 2021 XSE with Rustoleum high heat primer and paint. Part of the process is to cure the paint by doing the following:

Idle for 10 minutes - cool down.
Idle for 20 minutes - cool down.
Drive normally for 30 minutes - cool down.

So my question is - how do I force the gas engine to run constantly?

Anyone? Anyone? Bueller?

Thanks!!