Nested collapsible sections

I am trying to streamline a page that has collapsible sections. I want to add further collapsible sections.

Current state (example):

  • Collapsible Section 1: Fruit
    text text text
  • Collapsible Section 2: Apple
    text text text
  • Collapsible Section 3. Orange
    text text text
  • Collapsible Section 4. Vegetables
    text text text
  • Collapsible Section 5. Green beans
    text text text
  • Collapsible Section 6. Carrots
    text text text

Desired future state:

  • Collapsible Section 1: Fruit
    text text text
    • Collapsible Section 2: Apple
      text text text
    • Collapsible Section 3. Orange
      text text text
  • Collapsible Section 4. Vegetables
    text text text
    • Collapsible Section 5. Green beans
      text text text
    • Collapsible Section 6. Carrots
      text text text

Any tips are welcome