I've used these for the last year or so on my blinds. They work over Bluetooth so one at a time can be controlled despite them being in a home assistant group. This means if I close both of them, I watch one close first and then the other shortly after. Maybe another Bluetooth radio would work? Not sure. But I like the product itself because there is no other ecosystem and it's all local. Also solar powered so no cables running everywhere :-).
homeassistant
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
There's a bunch of things you can add to normal blinds to make them smart, the problem you'll face is that most of them are battery powered.
First example: https://a.aliexpress.com/_EGSpRhZ
Second example: https://a.aliexpress.com/_EwOUwWR
I grabbed one of these and attached to our largest blinds and they work phenomenally. The main issue is cost, but I really just wanted something as a proof of "how" to do it, and hope to come up with a cheaper homebrew later on.
At ~$160 each?
I’ll stick with Switchbot