We have some of that but it’s usually bespoke, custom made, e.g. PX4-Autopilot/src/include/containers/LockGuard.hpp at 7ac50a20b0b3c4ad539afd5f2c539233b7383240 · PX4/PX4-Autopilot · GitHub
That would certainly be nice, but will require compiler support. The latest arm-none-eabi toolchain is currently at 10.3 from what I see in Downloads | GNU Arm Embedded Toolchain Downloads – Arm Developer.
According to C++ compiler support - cppreference.com, some features might indeed be available there, e.g. span.