Engine Kill switch (Anti-Theft)

I've been reading about engine immobilizers and I'm not sure this is in fact what it does.

I'd like to know for anyone with a "key" ignition 2019 model and under, if theft is a concern at all? Since these are not push button start, does this mean they are immune (mostly) to theft?

Has anyone installed an inline switch to the engine fuse or fuel pump?
I think this would be a great option, where every time you want to start the truck, you have to manually flip a hidden switch that completes the circuit.

I'm sure this has been done on the 2.5 Gen Tundra, just didn't find a lot based on my key search words.
Thanks!

 

I have an inline switch but I have an aftermarket fuel pump/wiring. I use it for maintenance and when I go out of town.