From Longman Dictionary of Contemporary Englishstep forward phrasal verbHELPto come and offer help, information etc Police are appealing for witnesses to step forward. → step→ See Verb table
Examples from the Corpus
step forward• No witnesses to the robbery have yet stepped forward.• But no one stepped forward to identify the bombers.From Longman Business Dictionarystep forward phrasal verb [intransitive] to come and offer helpSo far, only one potential investor has stepped forward.step forward to do somethingMany of his colleagues stepped forward to publicly defend him. → step→ See Verb table 