Feeling Overwhelmed After Joining a Bigger Company

I’m a Frontend engineer with 3.5 YOE. I joined a large company 3 months ago after working at smaller startups, and I feel out of my depth. The codebase is massive, and coordinating with multiple teams is overwhelming. Everyone seems way more knowledgeable, and I feel like I haven’t contributed much beyond building UIs and integrating APIs.

Is it normal to feel like this after joining a new company, especially a larger one? How long did it take you to get comfortable with the codebase, processes, and teams to feel like a reliable contributor? How do I know if I’m just overthinking it or if I’m actually not good enough?