Glossary entry (derived from question below)
English term or phrase:
come forward
Portuguese translation:
apresentar-se; tomar a iniciativa; oferecer-se como voluntário
English term
Brazil
Genuine dedication and professionalism
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Spanish to Portuguese
coming forward
Don’t feel awkward if someone refuses your first offer, it can be difficult to come forward.
Apr 24, 2019 11:46: Matheus Chaud Created KOG entry
Proposed translations
Brazil
IT Specialist • M.A. in Linguistics
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Spanish to Portuguese, Portuguese to English, and 1 more.
se oferecer como voluntário; se apresentar; tomar iniciativa
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Note added at 4 mins (2019-04-10 19:17:53 GMT)
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Com base em
https://www.collinsdictionary.com/dictionary/english/come-fo...
Brazil
IT, Games, Linguistics and Marketing
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English, Spanish to Portuguese, and 1 more.
manifestar-se/apresentar
Nobody has come forward yet with information about the accident.
Ninguém ainda se manifestou com informações sobre o acidente. / Ninguém ainda apresentou informações sobre o acidente.
Will do!
Native in: Portuguese (Variant: European/Portugal)
Works in: English to Portuguese, French to Portuguese, German to Portuguese, and 1 more.
chegar-se à frente
https://www.google.com/search?q="chegar-se à frente"&oq="che...
Brazil
Governo, Negócios, Marketing, Turismo
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese
colocar-se à disposição
Traz o mesmo sentido proposto nas respostas dos outros colegas, apenas com palavras diferentes.
Talvez possa ajudar.
Portugal
Translator and Terminologist
Native in: Portuguese
Works in: English to Portuguese, French to Portuguese, Spanish to Portuguese
dar a cara
dar a cara
enfrentar a situação, assumir a responsabilidade
https://www.infopedia.pt/dicionarios/lingua-portuguesa/cara
Eu vejo o contexto como "enfrentar a situação", mas posso estar errada.
Também não sei se "dar a cara" é uma expressão que seja usada em pt-br.
Espero que ajude de alguma forma.
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Note added at 17 hrs (2019-04-11 12:15:20 GMT)
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Mais algumas "ideias":
verbo intransitivo
1.
apresentar-se;
avançar
2.
(ajuda) oferecer-se [to, para]
3.
sobressair
https://www.infopedia.pt/dicionarios/ingles-portugues/come f...
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