I think "coding" is commonly understood as writing code, not reading code, you know like if I say "I coded google jamboard", someone thinks I developed it, not read the source code. But besides, why do you need to extensively read code to understand whats going on?

Assume you read your code base once and understood it. You get a feature, discuss how its going to be done (well add this table, add these endpoints, etc). You should have a damn good idea already what thats going to look like in your codebase. I don't think knowing all the low level details is necessary (most people would call that micromanagement) and besides writing code yourself isnt going to help know all the low level details of all the other projects