No valid products? Multiple warnings? on my google search console

[samrose]

Hi, Ive tried just about everything but i cant seem to fix these warnings in my google search console for my products. What can i do?

Warning	Missing field "priceValidUntil"	Not Started		47
Warning	Missing field "review"	Not Started		47
Warning	No global identifier provided (e.g., gtin, mpn, isbn)	Not Started		46
Warning	Invalid object type for field "brand"	Not Started		44
Warning	Missing field "aggregateRating"	Not Started

thank you for your time

[samrose]

This problem still persists, please help!