Is it possible to customize files app with nextcloud version 28

I am starting with nextcloud version 28. I wanted to know is it possible to do small customization in files app like making a new folder as default & hiding some navigation tabs.

Yes, Nextcloud is open source and you can change the code.

If you speak of the default files/folder for a new user:

There might be even an app customCSS app:

and people were asking e.g. to remove the download button:

So depending on the element you want to hide, you need to be able to address this via css.

thanks @tflidd