Hi @kfbrown2022 - welcome to the community!

So I assume you’re using the “Classic Editor.”  Just for your reference, the New Editor allows you to “Sub-Bullet” with a Tab.  See here:

If you can’t switch to the New Editor yet, you can create sub-bullets (Nested HTML Lists) by editing the underlying HTML code.  Click on the “Source” icon, and then paste this code:

<ul>
  <li>Coffee</li>
  <li>Tea
    <ul>
      <li>Black tea</li>
      <li>Green tea</li>
    </ul>
  </li>
  <li>Milk</li>
</ul>

You can experiment with this here:

https://www.w3schools.com/html/tryit.asp?filename=tryhtml_lists_nested

Then, you can copy the code that starts with <ul> and ends in </ul> and into the Source of your Text Block.