With the wide functionality of the WooCommerce Product Filter, you can completely manage the elements in the product filter.
If you want the selected filter elements to be displayed at the top of the list, this tutorial will help you do this.
Checked Items to the Top
You can use this option only if you use a filter with checkboxes.
To enable this option open the Options >> Content tab and check the box for Checked items to the top
Now when you select the filter option, it will automatically be displayed at the top of the list
Checked Items In Bold
To enable the Checked Items In Bold option, move to the Options >> Content tab and toggle the option.
Now the checked items will be marked as bold.