The XinaA15 jailbreak by Zhu Xinlang (@xina520) for arm64e devices (A12+) running iOS & iPadOS 15.0-15.1.1 has been available as a beta to the public since the start of December 2022. It became public after an internal beta was leaked, prompting Xinlang to essentially throw both arms in the air and just begin seeding public betas instead of trying to keep it under wraps.
New speculation suggests XinaA15 jailbreak may be discontinued as Fugu15 Max progress continues