Just got email yesterday from Belkin, to tell me Wemo devices including their hugely popular Wemo mini plug and Wemo wall switch, outdoor switch and 3-way switch were on a list to be shut down in January, 2026. They're yanking the cloud server support required to make them work, and saying the only thing they'll still do after that is work on a LOCAL network via HomeKit.
It's not just Apple. Any of these vendors of "smart" devices get to dictate when they kill off the functionality. If it requires cloud servers, then all you did was buy some hardware that works with THEIR systems, on THEIR terms and conditions.
I use an Arlo video doorbell on my front door, and initially? I was fine with not paying for their optional monthly subscription that allowed uploading video to the cloud. I was content to use it so I could view live video when someone rang the bell, and to get push notifications when people walked within range of it. Well? After some relatively recent update they did, it seems I lost the ability to configure the zone the camera monitors for motion. They just monitor the whole darn thing if you don't pay for their subscription to "unlock" that capability. Worse yet? There's nowhere in their software to configure it to just stop alerting for motion. I had to suppress it on my iPhone app via the phone's own application settings.
It sucks but I don't see any alternative except buying only devices that give YOU full control over them on your home network. And a lot of those reduce the usability and convenience vs ones utilizing the "big cloud" offered by players like Apple, Google or Amazon.