Not at all. I’d say at this point at the time of this posting over 98% of Wi-Fi devices are not using matter. It’s literally only a handful. In fact, one of the main reasons for starting the matter project was that unlike Z wave and Zigbee, Wi-Fi did not have any standardized set of Home Automation messages. So one Wi-Fi light switch might expect to get the message “on” to turn on and another might expect to get the message “97” to turn on and another might expect to get the message “100”— wi-Fi itself does not define the content of messages. So every Wi-Fi switch manufacturer made up their own rules. Matter was supposed to standardize that so that every switch that was certified for matter, regardless of whether it used Wi-Fi or thread, or anything else would use the same message content to turn a light switch on. That’s enabling it to work with more platforms and more apps.
At the time of this writing, I believe there are less than a dozen Wi-Fi switches that you can actually buy that support matter. (Leviton, Kasa, and Tapo each have some. So far there are very few others, although another couple of dozen have promised, some models will be available in the future, but they aren’t here yet.)
Here’s one list of what’s available to buy today. Make sure you check the far right column. Only the ones that are marked in Green as “ready“ are now available, a lot of them are just “announced.“
Overview: Devices compatible with Matter | matter-smarthome
MATTER BRIDGES
As far as “matter bridges“, I hate to keep repeating myself, but have you read the FAQ about what you need to use matter with SmartThings? It has a detailed discussion of what a “matter bridge“ is, and in particular, it says, at least twice that, no, at the time of this writing no smartthings/aeotec hub works as a “matter bridge.” I could go into more details about that, but one of the main reasons I write FAQs to begin with is so that I don’t have to keep writing the same post over and over.
FAQ: What do I need to add a Matter device to the SmartThings app? Do I need a bridge router device?