It is not directly accessible from user-space. Making it so requires kernel support. Apple published a set of patches for doing this on Linux: https://developer.apple.com/documentation/virtualization/acc...

Without that kernel support, all processes in the VM (not just Rosetta-translated ones) are opted-in to TSO:

> Without selective enablement, the system opts all processes into this memory mode [TSO], which degrades performance for native ARM processes that don’t need it.