STARELO 5pcs 12mm Momentary Push Button Switch Silver Shell with pre-Wiring, IP65 Waterproof Push Button Switch,Stainless Steel 1 Normally Open Without LED.

I do what you’re talking about with this switch. https://www.thesmartesthouse.com/products/zooz-800-series-z-wave-long-range-dimmer-scene-controller-zen35-800lr?variant=41594421608511 But I connect the buttons through HomeAssistant to some light strips and other things. I believe you could easily add a ZWave module to your ESP32 and connect it directly to the switch with some code. In the future, if you expand your smarthome you can keep the same hardware and enroll your esp32 into home assistant with ESHome. If you want more simple and cheaper then maybe buy a blank plate and add your own buttons. https://www.amazon.com/dp/B09BKWMNJ9