I noticed in google search shopping tab that there you can filter by seller and or brand.
Is it possible to transmit them with google app? can i use custom fields to do that?
Thanks in advance
To be listed in the filters on the left, depends on the popularity of your products and or individual product. This means, you need to have clicks and impressions. The more you get, the more likely you will be listed.
The filters can not be forced.
So my recommendation is to improve your data feed by following the requirements and recommendations here: https://support.google.com/merchants/answer/7052112?hl=en