There are plenty of other chipsets that are lower in power consumption than ESP32. Raspberry Pi does provide the Pico 1 and Pico 2 for embedded stuff which is mostly great. Don't know if they fixed the errata 9 on the Pico 2 yet with the leaking GPIO thingy.
STM32, AVR based stuff, PIC, ESP32, Pico's. We got a lot of fun stuff to tinker with.