Surprisingly, Arduino IDE is not supported. Instead, use the command-line junyflash utility:
The earliest recorded instances of "juny085" date back to 2007, on platforms like LiveJournal and MySpace, where users would create pseudonymous accounts to express themselves freely. At that time, "juny085" seemed to be just another username, likely created by a teenager or young adult looking for an online identity. However, as the years went by, the name began to gain traction, with appearances on various social media sites, forums, and imageboards. juny085
Avoid manufacturer IDEs. The community maintains a based on GCC 13 with custom patches for the dual-clock domain. Surprisingly, Arduino IDE is not supported