Is this paired with S2?

I just installed this lock. Working great! The mesh details app, however, says it's paired with S0! Not the end of the world but from what I see it's S2 (I honestly have no idea what I'm reading numbers wise here)

It paired super fast and didn't asked for a key.

Go to the Z-Wave details page in settings. That will tell you what security was used.

The "S2" field (Security Class) field is a bitmap. 128 = bit 7 set. Your device is paired with S0 level.