All iOS versions are supported. As it’s a jailbreak in the phone itself as long as you have iPhone X and down your good. To update. Restart your device and make sure you aren’t in jailbroken state and update from there and then rejailbreak on the computer.
You can update to the very latest. Also on the checkra1n usb tool. If you update to an unchecked version just go into settings on ra1nusb and click “allow untested versions”. I’m on an untested version so it really doesn’t matter
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TimidNova's post in Public mod menu template? was marked as the answer