[9] On September 2, the Taiwan Beer basketball team announced to join the league as the TaiwanBeer HeroBears.

[13] On November 27, the 2021–22 season opening game, matched by the Kaohsiung Aquas and the TaiwanBeer HeroBears, was played at University of Taipei Tianmu Campus Gymnasium.

[14] On June 4, 2022, the Kaohsiung Aquas defeated the Taichung Wagor Suns, 3–0, winning the 2021–22 season championship.

[18] On October 29, the 2022–23 season opening game, matched by the Kaohsiung Aquas and the New Taipei CTBC DEA, was played at Xinzhuang Gymnasium.

[19] On February 28, 2023, the T1 League held the first All-Star Game at Taipei Heping Basketball Gymnasium.

[20][21] On May 21, the New Taipei CTBC DEA defeated the Tainan TSG GhostHawks, 4–0, winning the 2022–23 season championship.

[22] On June 26, the T1 League announced that the Taishin Sports Entertainment Co., Ltd. took over the participation rights of the TaiwanBeer HeroBears.

[28] On September 15, the T1 League announced that the 2023–24 season participation rights of the Taichung Suns was cancelled due to financial qualification.

[31] On October 28, the 2023–24 season opening game, matched by the Tainan TSG GhostHawks and the New Taipei CTBC DEA, was played at Xinzhuang Gymnasium.

[32] On June 1, 2024, the Taiwan Beer Leopards defeated the Taipei Mars, 4–0, winning the 2023–24 season championship.

[34] On July 9, the Tainan TSG GhostHawks announced to quit the new league preparation for the new season of the P.