I've seen the thread on single bullet points here but can't seem to find a way to add a 2nd or any additional levels (i.e. automatic indentation). Is this not a feature? I've tried the standard TAB key, but no luck.
Edit:
One workaround I've found is to use an external true Markdown editor like StackEdit to write the list/bullet points and then just copy and paste to Slack. This seems to work well until Slack decides to integrate Markdown.
Best Answer
Additional indentations are not currently supported by Slack. Slack provides a subset of formatting provided by markdown and other standards.
https://www.markdownguide.org/tools/slack/