Where can I get the saved codes?

Answer 1

Profile --> Code Bits

Or

Code Playground --> My Code Bits

Answer 2

On any tab (Discuss, Code, Community, Learn) click on your profile photo which is present at the top right corner
After that click on Code bits

Do this and you can see all your code.

For seeing the code of others

click on their profile pic ( For example click on mine )
After that click on Code Bits. You can then see code of others too.

Hope this helps
Happy Coding