Categorical Multi select option is not shown in the drop down menu

The Dropdown Column – Support

menu - multi selection dropdown - with or without checkbox - User Experience Stack Exchange

ASP.NET Core MultiSelect Dropdown Control

Token Box and Multi Select DropDown

Categorical Multi select option is not shown in the drop down menu - designer - Survey Solutions user community

Dropdown List and Multi Select Dropdown List - Gainsight Inc.

Create a dependent “Dropdown” control, Atlassian Analytics

dropdown - multi select list menu with 'Other' option - User Experience Stack Exchange

Creating a multi-select drop-down list? - 🎈 Using Streamlit - Streamlit