So the NHL DID provide a list of rosters
NHL opening night rosters for 2020-21 season
BUT they only include rosters already announced by their respective teams
So the following teams have announced rosters and are in the first post (Admittedly, there were too many for me to sort into approximate lineups, so they're listed just as the team announced them).
ARI
CGY
CHI
COL
CBJ
DET
LAK
MIN (Well sort of, they announced a full roster but did not disclose it though it was rather easy to figure out)
MTL
NAS
NJD
NYI
NYR
OTT
PHI
PIT
STL
TBL
VAN (Somehow they announced a roster of 24 players...?!?!?!?)
WAS
WPG
NOT ANNOUNCED
ANA
BOS
BUF (Taxi Squad announced)
CAR (Taxi Squad announced)
DAL
EDM (Taxi Squad Announced
FLA
SJS
TOR
VGK