Good engineers do more than just write code. Be more involved in technical discussions, be proactive in asking your manager about the feedback in every single 1:1. Befriend atleast one of your seniors and learn about their journey as much as you can. Seek feedback from seniors aswell.
Baki writing level code and understanding of product will come with time, remember Zomato believed in you when they hired you, they know you are capable enough. Talk to your peers who joined with you, share your feelings, I'm sure most would be in the same boat.
Rest don't worry, being anxious will only make you think about work 24x7, which in the long term is detrimental to your physical and mental health, it's not worth it.
You can probably take up some side projects as well and work on them as and when you get the time to do so.