Personally- I would avoid the 433 MHz stuff. I’ve never gotten it to work reliably.
Next, I only have one set of smart lights and probably won’t buy them again. They are Ikea Tradfri lights and work over Zigbee. I have settled on Z-Wave, mostly Inovelli switches**, only one is a dimmer but I’ll probably add another soon. I have a lot of ESP8266 nodes around the house (over WiFi). Mostly Sonoff Basics and one Sonoff Switch. I also have Sonoff 4CH modules controlling my lawn sprinklers. In addition I have a few temperature nodes made from the ESP8266-01 and DS18B20 sensors. This summer I plan to add a solar-powered node with a capacitive moisture sensor to control the watering of my tomato plants.
In other words, there is a lot that you can do with IOT in the home. There simply is no one solution.
I mentioned that I only have one set of smart lights. I bought them because I wanted some experience with the Zigbee protocol. I am not excited to add any more ZigBee devices. (But that’s just me). I trained as an electrician (last Century) and I am not the least bit hesitant to rewire my switch boxes, so I have no need for a smart light. Besides, when my LED lights quit (and they do fail eventually), I am only out the $5- to $10 to replace the bulb. As opposed to replacing a smart light for $20 or more. I have yet to see the benefit of changing the lights’ color or using a dimmer in most locations- but that’s probably just me.
On your 433 MHz switch- unless it’s real close to the 433MHz receiver, you will not be happy. Another reason to avoid 433MHz stuff is because there is no feedback to Home Assistant. This is necessary if you turn on the light with the wall switch. Z-Wave and WiFi devices will send their state back to Home Assistant, but 433MHz devices won’t. This means, the dashboard won’t show if the light is on or off.
** I have mostly Inovelli Z-Wave switches and a dimmer, plus one GE switch. I like the Inovelli switches because I can use existing wall switches (I.E., cheap) for three-way and four-way circuits. With GE you have to use their satellite switch in 3- and 4-way circuits. At $20 each this was a no-brainer.
I’m rambling- what is the question?