Excel Nested dropdown lists in Excel 365

I am looking for a freelancer who can help me create nested dropdown lists in Excel 365. I need 3 or more nested dropdown lists for my project.

Skills and experience needed:
- Proficiency in Excel 365
- Experience in creating nested dropdown lists

Requirements:
- I have all the data ready for the dropdown lists.
- I will need detailed instructions on how to create dynamic dropdown lists.

Please provide examples of your previous work with nested dropdown lists in Excel 365.