I don't see the word playoffs there anywhere. Twitter's cool but try this site:
Official Site of the National Hockey League
Here are some headlines from nhl.com:
"Chicago to play Vegas in first round". First round of what do you think?
"Coyotes to play Avalanche in first round" Again, first round of what?
Note all the articles (including the one about Maple Leafs comeback) under the heading "Stanley Cup Qualifiers". Qualifying for what do you think?
Every article I've seen about these games now being played calls them "postseason", not playoffs. Usually they're the same thing but not in 2020.
If these games are playoff games, you better let the NHL know because they seem to think differently.