Who to talk to get ARM64 Windows into Tier1?

My company is refusing to let me build a high perf app in Rust, because some of our clients use ARM64 Windows, because of Surface Pro X.

The rationale given is ARM64 Windows is Tier 2, by a senior engineer. Fair enough.

They told me if I can get Rust to Tier 1 support, I can use it.

I have no idea how to engage, so pardon my low effort post here to get some eyes.