@k_bobade Assuming you are using querybuilder.json, in above screen shot. Please check response marked as correct in below post:
https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/provide-restricted-access-...
Quoting from the same thread:
Try the XPATH or JCR-SQL2 equivalent of the above query which has support for wildcard character in jcr:contains
(You can arrive at the same using Explain Query: Tools -> Operations -> Diagnosis -> Query Performance -> Explain Query -> Key in your Query builder predicates -> You can see the XPATH and JCR-SQL2 equivalent and index used)
There is no explicit mention about wildcard support in fulltext Query Builder predicate.