【help】【help】【help】【help】how to fix missing "review" missing "brand" missing "SKU" error on googlle?

I register a new shopify store and submit to google search console,after 5 days,i get many error alert like missing “review” missing “brand” missing “SKU” and“aggregateRating” “image”“description”“offerCount” but i have these information,take a look at my image

i can not post all the code screenshot, if anyone can give me some advice,you can check my website https://alittlemonk.org i don’t want add any app,because app will make my website slow,hope there is a way can fix these error.

I check on https://validator.schema.org/ but find no error,why?