New major features are:

TF-M eRPC Test framework 1 is integrated.
TF-M builtin key loader integration is reworked.
Improved crypto library abstraction from TF-M Crypto service.
Kconfig system is enhanced and finalized.
Switch to upstream QCBOR 2.
Enable PSA Authenticated Debug Access Control (ADAC) 3 support on Musca-B1 platform.
Support Floating-Point (FP) with Arm Compiler.
FF-M API uses signals to drive the partition scheduling instead of controlling partition context directly.
MCUboot upgrade to v1.10.0.
Mbed TLS upgrade to v3.4.0.
Refine documentation restructure.
It is optional to update copyright year in changes. Requirements of copyright note update is updated in Contributing Process.

Please check the release notes for more information.

The release branch changes will be ported to the main branch shortly.

Many thanks to everyone for contributing, reviewing and supporting this milestone.

Anton