You’d be shocked - anything that requires RF, like car key fobs, gate/garage remotes and discrete power/timing/IO, chances are those components are coming from Microchip, Intersil, ST Micro, ADC and National Semiconductor. Part of the electronics shortage - plenty of the “big” chips like DRAM/NAND, CPUs/GPUs/SoCs but not enough of the supporting cast like RF/discrete power/IO/networking/timing/battery monitoring - those are all specialized ICs that don’t use the latest and greatest process tech but have an important supporting role.