h4visarelated

Hello Everyone, I have situation to discuss and get feedback on it. I am in USA working for Company A, My wife visited to India 2019 Dec and she did visa interview for H4 and has valid H4 Visa stamp until 2023 based on my Current H1B with Company A Due to COVID and Travel Ban situation, she couldn't travel back whole year but now she is planning to return to USA by March 2021 Situation is: I have now changed my job in USA and now my company is B, can my wife still enter USA with H4 Visa stamp based of Company A since her H4 visa is still valid until 2023 or she needs to go for Visa stamp again so that she will have my Company B info on her Visa stamp?