https://os.mbed.com/blog/entry/Important-Update-on-Mbed/
Today we wanted to share some important updates with the Mbed community:

The Mbed platform and OS will reach end of life in July 2026, when the Mbed website will be archived and it will no longer be possible to build projects in our online tools
The device software - Mbed OS - is open source and will remain publicly available, but is no longer actively maintained by Arm
The Mbed TLS project is unaffected by this announcement and continues to be supported as part of the TrustedFirmware community project.