Is there a way for me to create my own multiple choice widget that will display in the forms section . I don’t want to overwrite the built-in view and JavaScript of the Sitefinity multiple choice widget.
If you want to create your own form field widget, then you can follow the doc article here: https://www.progress.com/documentation/sitefinity-cms/for-developers-create-new-fields-for-forms-mvc
but modify it to be a multichoice widget.
You can check the source code of the built-in widget here: