Missing list formatting in the text editor - same for line spacing

Steps to reproduce

1. Create an e-mail message
2. Create lists in the text editor
3. Create line spaces, single and larger (e.g. Enter or Shift + Enter)

Expected behavior

The same list in the e-mail editor actually looks like this:

This is how the distances are in reality, e.g. in Word etc.:

Actual behavior

This is how it looks in the editor, which is very confusing and leads to formatting errors when sending, as you cannot see the indentation when composing.

This is what it looks like when writing:

Mail app version

3.5.4

Mailserver or service

No response

Operating system

FreeBSD 13.2

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database

MariaDB

Additional info

It would be great if the text editor generally displayed the same formatting as the e-mail is displayed in view mode.

I'm also thinking of single and multiple line breaks, which can also cause problems. When composing an e-mail, you cannot see visually whether you have made only one or a larger line spacing (e.g. Enter or Shift + Enter).

No file, test, or entry point is identified in the issue. Begin by locating the compose text editor and the view-mode formatting behavior, then determine how list indentation and single versus multiple line breaks are represented. Done means the compose view visibly matches the rendered email formatting for these cases.