Every six months, a new pre-built GCC toolchain for ARM is released. On December 10, release 14.2 Rel1 was published: https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads. There are some goodies related to upcoming C++26, such as better support for modules. Check this RedHat blog for an overview of what's in it.
I'm trying to convert a library that I made for GPS communication to modules, and was looking forward to this release. In version 13, I got stuck because of limited support for this. Crossing fingers ...