I’ll also add my support for the Kasa switches as an available alternative to the Wyze Switch. I was preparing my home for an extended time away from it a few months ago. I installed five Wyze Switches, but I really needed seven. I installed Kasa switches as my final two; an HS200 (similar to the Wyze Switch), and a KS225 (which is like a Wyze Swich with a dimmer on it.)
I too had a concern about adding something outside the Wyze ecosystem, and just desired to have everything in one place on my phone to control things. Truth is, the Kasa’s worked better and had a more desirable timer setup than Wyze. I wanted to randomize the start and stop times on my different lights, but not to the extent that Wyze’s “Vacation mode” does. Wyze’s Vacation Mode is so random that it might turn on a light for a very short or very long time, OR it might not turn a light on until after 10:00 pm (as an example.) I wanted my home to look occupied while I was away, and that included various lights switching on and off at the more popular times others might notice, such as between 5:00 and 9:00 pm. I was able to set up the Kasa timers more easily (day by day) to do this. For Wyze, I had to set up separate schedules and be manually switching schedules from abroad.
I’ll also say that the Wyze Switches failed to operate correctly after about 30 days, and I’m still trying to get an answer to that one. After about 30 days away, the four Wyze Switches I had on schedules suddenly stopped following the schedules I’d set up, all at once. I could still manually control them from overseas, but they would no longer follow the schedules I’d set up for them. I’m still trying to get an answer to that one. If I can’t get that resolved, I’ll switch them out to Kasa switches.