Are gtins / mpns necessary for clicks?

I am a dropshipper and I believe I can't get the gtin number without purchasing the product. Idek if dropshipping products have gtins / mpns.

My shopping campaign is getting impressions and no clicks and it says performance is limited because it's missing gtins / moms / brand. Is that something that should be a priority for me to fix?

I am pretty new to Google ads. Thank you!