It looks like Destiny 2 has hit over 226k concurrent players on Steam, according to Steam Charts, since its release on Tuesday.
Steam Charts also indicates a 24 hour peak player count of just over 223k, as of this writing. Additionally, according to Steam DB, Destiny 2 an average play time of 3.6 hours over the last two weeks. Of course, this realistically covers the last few days, since the game has not been out for two weeks. Right now, it looks like Destiny 2 is the fourth most played game on Steam, just behind DOTA 2.
In case you missed it, check out our initial impressions of Shadowkeep right here, and look forward to our full review next week.