Multi-Select without CTRL-Shift or Commnad Key

Hi, I have a form with a multi-select field. However, it appears that by default, the multi-select requires users to press the command key in order to select more than one item.

Is there a way to offer a multi-select without the user having to press the command key?

Here is my site Read-Only: LINK
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In general I think a preferred UX would be to dynamically generate a range of checkboxes, and you can do that with a collection list if you have those items/values in a collection.

But if you want to use a form select for this, you can override the browser’s default behavior with some custom code;