Last year I was in Calgary at -40C. Car sat overnight outside. Sat for at least. 15 hours. Started okay. 2020PHEV . Keep in mind motor is only 2.0 litres and starter is driven by 300 volt traction battery. Keep traction battery at half charge or more and should be no problem.
IMHO
2020 GT (Canada Model.)
Notes:
Should not use car in acc. mode.
12V lithium battery( there is only one in the boot) is low capacity. It is not meant to run all 12v lights, fans, etc. It has 2 main functions- maintain the software and settings; and pull in 12v relay by using start button...