KV Anywy to check if my KV is still jail broken?

Some context first:

I'm on 5.12.1 fw so no jail breaking possible. But it occurs to me that my KV might already be jaibroken. I'm at a loss as to how to check this.

Here's why I think all might not be lost:

So I used to have my KV jail broken long ago with kual and & co installed. I'm a bit nebulous on details but at the time I think I left some startup option enabled. Maybe it was usb networking.

Anyway, an OTA update came, disabled that, and my KV was bricked with a "Your device needs repair" message. No amount of resetting helped.

In the end I put a file named DO_FACTORY_RESTORE in the root as instructed here (originaly I found the russian site). After a reboot/reset everything was fine and dandy.

Do you think jailbreak might have survived that process? How could I check?

Thanks in advance!