Hey @konpon96, glad I got you excited, please do update with your findings! Is this website reliable, does it ship internationally?
Also, do you know these two meet the criteria for what I listed (meaning: sync between state when shutter is controlled manually), and do you know the difference between them and the Aqara one I listed above? I have also found some controllers by Tuya that look like this one, have you gotten to try them?
There’s also this guy which seems to have two buttons for setup, but I couldn’t find price or availability, nor do I understand why it has 5 pins instead of 6.