Signal have been blocked in several countries including Russia and Telegram has more users there and it isn't blocked.

It`s posible to flash custom firmware on WearOS watch, but it must support unlocking bootloader.

I have SV06 and I'm happy with it. It has decent build quality and prints pretty well. It isn't the best printer, but it will be hard to find something better for that price, especially if you buy refurbished unit from their website. I flashed mine with klipper and you should know that it doesn't like some sdcars. It also doesn't have runout sensor. You can ask me if you have some questions.