Hey @ValleyKumar
Once you have updated your game to 2.4.4, you will be able to see the Twitch connect button on the lower right corner. Please make sure to connect your account with the Twitch account where you claimed the drops during the campaign.
However, we are aware of an issue that is preventing many PS4 users from seeing those recipes ingame despite having followed all the steps correctly. That is being looked into at the moment and we aim to resolve it either via our backend, or in a future patch for the game. For now, if you have those items claimed on Twitch, don’t worry as they are yours and will be available ingame once we resolve this issue.