Hi Fualefac Bezah,
Thank you for reaching out to us on the Microsoft Q&A forum.
I’ve checked the Slicer settings on my end, and the Style section is available under Slicer settings. Please ensure you have the latest version of Power BI installed and are using the correct slicer type (e.g., List or Dropdown) to access this option.
Here’s a screenshot for reference:
If you are still facing any issue, please let us know in the comments and where you are encountering this error along with the screenshot for reference. We are glad to help you.
If you found the information helpful, we would greatly appreciate it if you could acknowledge it by selecting the Accept Answer & Upvote options.
Thank you.