On the landing page: https://learn.arm.com/learning-paths/cross-platform/multiplying-matrices-with-sme2/
It lists
Arm IP: Neoverse Cortex-A Arm C1
which should be:
Arm IP: Arm C1
FEAT_SME2 is available in Arm IP starting from mobile (TC24) and large screen compute (LSC25). It is currently not in the infra roadmap.