Mildly off-topic: I love ESPHome, and have used it for a couple of IoT-based temperature sensors around the house, but the thing that always makes me fail the WAF (Wife Acceptance Factor) is getting all the mess of ESP32s, sensors and wires all in a nicely tucked away container. What are y'all using to hide away the electronic components?
For things that need to be stand-alone I'd first check if there's an existing off-the-shelf option first which generally would be more cost-effective to buy and look better than anything I could make myself.
For temp sensors specifically I generally just go with whatever off-the-shelf stuff is supported by this firmware: https://github.com/pvvx/ATC_MiThermometer - as a bonus they can run on battery for a year or more.
I can recommend Tupperware containers. Come in all shapes and sizes and really cheap. If you get one with a glass bowl or transparent plastic you can even look inside without components getting dirty. When mounting to a wall screw your boards onto the inside of the lid and then the lid onto the wall. With this you can access it easily by removing the container from the lid. Only downside is that they can look ugly when in plain sight.
I 3D print enclosures for my projects. Usually I find an already designed one on Thingiverse that fits close enough. If you're using common components you're likely to find an exact match.
