The feature of creating multiple forms is only available in the highest plan of the application (ADVANCED PLAN)
When you upgrade your app to the ADVANCED Plan, you can create different forms without having to follow the same template. With this feature, you can completely apply to products, product groups, collections with completely different properties that with just one form you cannot do.
Basically setting up the forms of this Advanced plan is still the same as if you were using a single form plan.
Note: When you use Multi-form, you can only use the Request a Quote (Quick quote) feature, can't use the Bulk quotation (Add to Quote) feature.