These sorts of low-power coprocessors are quite common. You can buy Cortex-A/Cortex-M combos from multiple manufacturers on digikey. It's not just big applicat

These sorts of low-power coprocessors are quite common. You can buy Cortex-A/Cortex-M combos from multiple manufacturers on digikey. It's not just big application processors that have them, either; some microcontrollers like the ESP32 have them as well.