What about a lil Buddy heater? I have the BIG buddy in my garage and it works great!
https://www.webstaurantstore.com/mr-heater-little-buddy-portable-liquid-propane-radiant-heater-f215100-3-800-btu/778F215100.html?cnxclid=17031122550640356214819051118008005
I am not 100% sure I am correct and I am sure someone will chime in if I'm not, But I recall reading it at one point that the USB ports stay powered for 2 hours after ignition is off.
My truck did not come with remote start from the key FOB and so I bought this Start-X unit.
It's been working great for over 3 years now.
https://www.amazon.com/gp/product/B07F422Y98/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
I second the "Night light" mod..... If you have a 110V outlet in the rear of the center console, plug in a night light and that will cancel the start stop. Going on 3 years with no issues.
Here is how I blocked off my fresh air inlet. I cut some wire mesh down to about 3x5 and secured it with butyl tape after cleaning the paint inside that area to help it stick. I used shoe goo on top of that and it is holding on solid!
ALso.... Check your air cleaner for mice/rats too. I used...