Missing "aggregateRating"

Variable product example
4 warnings
Missing “aggregateRating” field (optional) – what is it? How can I add this?
Missing “brand” field (optional) – I’m using brands via attributes, see the second product tab, but why doesn’t that work?
The “review” field is missing (optional) – do I understand correctly that this is because I turned off reviews?
The global product identifier is not specified, for example, the GTIN, MPN or ISBN code (optional) – I am using the SKU but for some reason I still get a warning? (see the second product tab)

Yandex micro-markup validator:

article: modified_time
@value = 2021-06-29T13: 21: 52 + 00: 00
microdata
ERROR: Unable to determine the ownership of these fields. There are two possible reasons: these fields are incorrectly placed, or an unnecessary itemprop attribute is specified
rdfa
ERROR: the article prefix is unknown to the validator, specify it explicitly with the prefix attribute
https://schema.org/Organization
—
…
—
https://schema.org/query-input
WARNING: the field https://schema.org/query-input is not defined in the spec http://schema.org/SearchAction
@value = required name = search_term_string

can you fix it?

Hello,

This is the Woocommerce feedback on the issues: https://github.com/woocommerce/woocommerce/issues/22896#issuecomment-477074896

We will fix the issue with the brands in our nearest update.

Best Regards

[Author]

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