If Overwatch 2 Twitch drops aren't working for you - you can still get in

techradar.com:

Viewers who tuned into Overwatch on Twitch to receive their promised access to the Overwatch 2 beta, have been left frustrated as that access has failed to materialize.

The Overwatch 2 beta Twitch Drop promotion seems to have been a resounding success. The game peaked at a staggering 1.5 million concurrent viewers on Twitch last night, as players tried to get in four hours of Twitch viewing to gain access to the beta.

However, the program doesn’t seem to have worked for everyone. A tweet by the Overwatch account celebrating the viewership achievement is plagued by users who say they've claimed their Overwatch 2 beta code on Twitch, but haven’t had it appear on their Battle.net account. 

Some have reportedly been waiting hours to be let in, despite claiming the reward in their Twitch Drops inventory. In response, Blizzard community manager Andy Belford tweeted that the process can take time. He said:

What a day! A few updates for everyone1. Drops don't redeem immediately. There's going to be a bit of delay in between you claiming, and seeing the Tech Beta client in your launcher2. We're working on increasing server capacity now, sorry for anyone dropping from game!April 27, 2022

Later, he clarified that for those who are only just linking their Blizzard accounts to their Twitch accounts, there will be a sizeable delay:

Important drops info: please make sure that your Blizzard acct is connected to Twitch within at least an hour after claiming (assuming you didn't double check this morning), otherwise you may have significant delays in receiving accessApril 27, 2022

Going further, the Overwatch Twitter account has said that the vast majority of issues are coming from players who have incorrectly linked their Battle.net and Twitch