1) Start contributing heavily to a popular open source project you're familiar with and use. Try to make your PRs as high quality as possible. You'll get free code reviews from some of the best engineers in the world doing this. That'll be a million times better than ChatGPT code reviews and you'll be able to learn a ton from it while also getting your code into production at thousands to millions of companies in the world that depend on the open source project/s you choose to contribute to.
2) Fill holes in your knowledge base. If you feel weak in a particular area like networking or DSA then study and practice with it until you no longer feel weak in that area. If you were on my team I would try to assign tasks to you to help you naturally build out knowledge and confidence in your weak areas but without someone to do that for you, you'll need to try to figure out your own weaknesses.
3) Always try to do your best when working professionally. This is all any of us can ever do and if you actively practice it then it'll become a habit that will guide you toward success in any environment.