Customization in Opportunity Marketplace through VBCS in Redwood

Hi Team,

In Redwood environment, as part of the testing for Opportunity Marketplace, when the Employee login to the application and click on Opportunity Marketplace opens any Job, we observed that there are multiple extra field visible in the UI. Also, when an Employee referring a candidate also, we observed there are multiple extra fields available in UI when we compared to DEV1(non-Redwood).

As suggested by Oracle, we have checked in VBCS, and we are able to hide the fields from the Refer a candidate page but not Job Info page.
We are interested in knowing the impact of this change (From the upgrade perspective) if we hide the fields through VBCS in Refer a Candidate Page and also how can we hide the extra fields from Job Info page.