via Elliotte Friedman tweets,

Hearing NHL has notified teams it is investigating process of Evander Kane crossing border from US into Canada on Dec. 29. (1/x)…

Kane tested positive for COVID on Dec. 21, and flew to Vancouver on the 29th. In termination notice from SJ, it was alleged he did not have proper medical clearance. NHL is now doing full investigation…(2/3)

This will likely prevent a Kane signing in the short term, as teams await the results.