JDM mzr ecu's...require immobilizer or not?

I'm contemplating using an MZR engine in a racecar.

1) Do you now if JDM mzr ecu's will be require an immobilizer (gauge cluster etc).

2) If so can USA dealers pair them to USDM gauge clusters /keys etc?

Pending answer to above, next will be Can bus questions.

I'm not a mazda guy yet! so not sure where the best technical forum for MZR engines is on the interwebs.

Thanks in advance.

P.S please stick to specific questions (I'm a very experienced ,53 years old-ouch!, fabber/mechanical engineer.good with microcontrollers etc, have done weird engine swaps in the past etc)