Bullet List Indentation not showing up in the wordpress

One simple way to address this, if you only have access to the block editor, would be to click on the three dots, edit the block as HTML and add something like this:

<li style="margin-left: 60px">

(Change the value to suit.) It may not show in the block editor, but will when you load the page.

To handle this site-wide using CSS, you could use the Simple Custom CSS and JS plugin for example, and add a rule like this:

li { margin-left: 60px; }

… but that would have to be customized to your site to work properly since you probably don’t want to affect ALL list items.