Can giveaway product reviews be consolidated with regular product reviews?

I am a shopify newbie. I just created a new website for hair loss products. I’d like to try giveaway event for grand opening. I created a giveaway product sku and ask people to write review when they receive free product and after they try out. Can the giveway product sku review consolidate and share with regular product sku? or should I convert regular product sku to giveway sku to build up some reviews? Is there a way to prevent one guest from applying multiple times?

Please kindly advise.

Thank you,