How to copy and customize a countries form with flags in a new space

I created a space with a form that includes a dropdown list of all the countries in the world, each accompanied by its respective flag. Now I need to create another space that contains this same dropdown list of countries and flags. I would like to know how I can copy this form and then configure it according to my needs. Previously, I tried to create two identical spaces, but the content was multiplied. How can I do it correctly this time?

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