Yes. In order to show the same question to multiple products, you can assign it to as many products as you want from the backend question edit form. Reference documentation ...
Yes, to show the selected simple product's label set the Use for Parent to Yes under the Label Information tab. Reference guide: https://magediary.com/docs/product-labels.html#label-information
We can add custom CSS to the label text and its container block. The following fields are available under the Label Configuration tab. Custom CSS for Label: add CSS to the label text div block Reference ...
Yes, we can configure the following fields under the Qty Range tab section. Product Qty From: set the starting qty Product Qty To: set the ending qty This label will be displayed to products that a minimum available qty 100. Product Qty From: 100 ...