I've been using the Liquid Wrench silicon spray for years as part of the normal Winter prep routine. Keeps the doors from freezing shut. I also used graphite powder as a lubricant for the door/trunk locks... although that's not necessarily relevant with newer vehicles, as it was with older.
It's messy, but may switch to this for the coming Winter. Bought the bottle for an unrelated project.
https://www.amazon.com/gp/product/B077PD43P8/
Says manufactured by Tribology, Made in USA.
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