Hmm, Sometimes the rewards for big amount transactions are not given automatically or you have to wait.
Anyway, you'll definitely get the rewards; you just have to wait.
By the way, your account wasn’t upgraded, right?
For some people, even after their account is upgraded, their Firstap card remains the old account variant.
Just a few days ago, someone received a ₹4K welcome reward on Wealth account. He mentioned that his Firstap card is an old one from when his account was a Select account.