Problem:
Search "Title, body and custom fields" in View Block.
Solution:
With view block, for the step "Integration with custom searches", you can try these:
1) In section "View Search", add a search field "Text search (title and content)",
2) find and select above search field "Text search (title and content)", in the sidebar, enable option "Title, body and custom fields"
Relevant Documentation:
https://toolset.com/documentation/user-guides/views/searching-texts-custom-fields-views-relevanssi/
