[3] Yang made her senior debut for New Zealand in the 2022 Billie Jean King Cup playing in Pool A Asia/Oceania Zone Group I matches against China, South Korea and Indonesia in April, 2022.

New Zealand captain Marina Erakovic championed her inclusion saying "Vivian is one of our best young players coming through.

She played extremely well, and was able to actually really dictate on her own terms with that lefty serve and forehand, and she had a couple of set points but just got a little bit tight, that inexperience but yeah, just really positives out there for her.

"[6] Yang secured her first senior win a few days later against Indonesia’s Beatrice Gumulya with a 7–5, 6–2 victory on 16 April 2022.

[9] In December 2024, she won the wildcard play-off to earn a spot in the main draw of the 2025 ASB Classic.