Apache solr search for multiple fields without specifying field name

Question

Apache solr search for multiple fields without specifying field name in solr 7.7.2 version. Created copy field for all fields and assigning it to dest=“text” which is field of text type. But it doesn’t give any output. It works for only one field where df=fieldName.

It has managed schema which automatically override the changes after indexing, please let me know what would be the issue.