This technique of pressing the dead key to the starter button works for quite a lot of brands, not just Stellantis vehicles. Always worth trying if you are in a "keyless" car with a dead key fob battery.

In my experience virtually everything made in last 15 years will either support this RFID backup or have a spare physical key hidden inside the keyless fob.

Lots of them will even let you press the dead key against some part of the exterior to unlock the doors too.