I bought these bulbs because the Amazon page said they support Matter, but I was a bit worried because Matter isn't in the description. 
 

Well, I got the bulbs (I ordered two 4-packs), and I've installed one and sure enough, there is nothing to indicate Matter support, either on the box or in the app for the bulb. 
 

Or am I doing something wrong? Is there an update I need (I don't see any updates in the app?)