[4] On February 25, 2018 Phayahong faced COMACHI at KODO 3 for the interim WPMF World Pinweight title.
[9] Phayahong made her next appearance with Legends Fight Championship on November 20, 2022, as she was booked to face Margaret Wanek.
On October 19, 2024, Payahong defeats Saya Ito by unanimous decision, becoming the first-ever Rajadamnern Stadium Female Minimumweight Champion.
[11] On December 28, 2024, Phayahong Banchamek successfully defends the Rajadamnern Stadium Female Minimumweight Championship by defeating Thailand’s Kaosuay Por.Kobkua via unanimous decision at the RWS promotion event.
[16] On May 12, 2022, K-1 announced that they would be holding an atomweight Grand Prix, which would crown the inaugural champion, at the all-female kickboxing card at K-1: Ring of Venus on June 25, 2022.
[19] Phayahong advanced to the tournament finals, where she faced the reigning Krush Atomweight champion Miyuu Sugawara.
[20][21] Phayahong made her first K-1 Women's Atomweight title defense against Miyuu Sugawara at K-1 World GP 2023: K'Festa 6 on March 12, 2023.