open https://en.wikipedia.org/wiki/Wikipedia in a desktop computer.
notice the second "edit source" link (to the left of "View History") has a tooltip that says "edit this page".
clicking on that link shows the entire page's source code, down to categories at the bottom.
now open https://en.m.wikipedia.org/wiki/Wikipedia (mobile version).
notice the second "edit source" link (to the right of "History") has a tooltip that says ""Edit the lead section of this page".
clicking on that link shows only the page lead's source code.
so it's not possible to edit the full source code in the mobile version.
this prevents, for example, moving content across sections or changing the order of sections.
this problem occurs with both the web version and the android app.
a workaround in the web version in mobile devices is to ask for the desktop version.
user preferences:
- Appearance: Skin: Vector 2022
- Editing: "Use the wikitext mode inside the visual editor, instead of a different wikitext editor." enabled.