[Question] why tmux prompt at the bottom?

[Semnodime]

[Question] why tmux prompt at the bottom?

[romkatv]

Is it expected behavior that the prompt inside tmux resides at the bottom?

Yes.

If yes, can this be configured somhow?

Yes.

https://github.com/romkatv/zsh4humans/blob/master/tips.md#prompt-at-bottom

[Semnodime]

Further searching through github issues, and related projects, I was able to comprehend your motivation for choosing the default setting to have the prompt reside at the bottom as per your explanation in romkatv/powerlevel10k-media#2 (comment)

[A] non-constant prompt position means you cannot set up your terminal window in such a way that it's always convenient to look at the most important information in it -- the prompt and the output of the last command.
This issue has been bothering me enough that I've configured my own shell to always have prompt at the bottom.

So it's actually rather a feature than a bug.

Since you noticed it being unconventional and potentially overwhelming, you even decided to deactive this behavior

if you choose to enable tmux in the installer.

…which I didn't.