2021–2024: Departure from JYPE, solo music and world tour
On January 19, 2021, following the expiration of his contract, he left JYP Entertainment. On March 5, 2021, Abyss Company announced that BamBam had signed an exclusive contract with them. On March 16, he received the Inspirational Role Model for Youth Award at Thailand Master Youth 2020–2021 Awards. On May 17, he acted as MC for the Thai version of Simply K-Pop Con-Tour.
On June 15, 2021, he made his solo debut in South Korea with his first extended play, Ribbon, and its title track of the same name. He performed at SBS 2021 Super Concert in Daegu on October 31, and at 2021 K-Expo on November 6.
On December 28, 2021, BamBam released a new digital single, "Who Are You", featuring Seulgi from Red Velvet, which served as a pre-release for his new album. On January 7, he officially announced the release date of his second extended play, B, set for January 18. Its lead single, "Slow Mo", was released on the same day, accompanied by a "dreamlike" music video.
On April 22, 2022, BamBam released a new digital single, "Wheels Up", featuring Mayzin, under the newly established music company, Golden State Entertainment. From May 27 to May 29, he acted as MC for Mark Tuan's solo fan meeting in Thailand.
On March 28, 2023, he released his first studio album, Sour & Sweet, and the music video for the title track of the same name. He subsequently held his first world tour, Area 52, from September 19 to November 18 in South Korea, the Philippines, China, Malaysia, Vietnam, Thailand and Japan, selling out over 50,000 tickets for the Thai show at Thunderdome Stadium. He performed in South America and Europe in March 2024, while the North American leg of the tour was cancelled due to an ankle injury.
On May 4, 2024, BamBam returned to Bangkok for his The 1st World Tour "Area 52" Encore concert at Rajamangala National Stadium. The sold-out show saw the participation of Red Velvet's Seulgi, with whom he performed "Who Are You". He released his third extended play, Bamesis, on August 8.