Hi @fstillone,
Thanks for reaching out. Yes, the plugin will not appear in the Do a search for method. The right way of doing it, is simply displaying the data in your RepeatingGroup when the Custom Dropdown value is changed.
The plugin offers you an event:

So you can set the condition when a certain option is selected from the dropdown, it will Display list in RepeatingGroup with a certain filter.
E.g. you have two options in your dropdown: ASC and DESC.
When the value of dropdown changes and the selected option is the first item (ASC), you display data in your RG based on a filter with ascending order. Respectively, if the second item is selected (DESC), you display data based on a filter with descending order.
Hope it helps.
Best,
Alex