NHL decided to do an investigation only after he was.close to signing with another team and not in the weeks prior, and now weeks later they're admittedly dragging their own feet on a decision because it seems likely they want him out of the league.
Just a little bit of a dramatization of events...
Kane was terminated on January 9th... By
January 12th, three days later, reports had begun that the NHL was investigating Kane's COVID violations - which was also less than a day after insiders (and Tim Peel) started making connections between Kane and specific teams and his
own agent finally spoke up about working on deals.
Furthermore, the last big profile termination appeal/investigation to take place - Mike Richards - took two months to reach a resolution, August 10 to October 9.
The last two Evander Kane investigations were resolved on similar timelines (Gambling, July-September; Domestic Abuse, September-October).
Don't be shocked if the investigation, especially if they are working with federal authorities, takes longer than the less than two weeks it already has.