With RunsOn, any AWS EC2 instance with Graviton processors can be used for GitHub Actions.
You can select any instance type and use job labels to configure details such as number of vCPU and RAM size.
RunsOn is free for non-commerical projects. You pay the cost of the EC2 instances that are used and a small free for the AWS App Runner service.
Which Neoverse processor is not available for GitHub Actions when using RunsOn in AWS?
Neoverse N2 is not available in AWS. Graviton2 is Neoverse N1, Graviton3 is Neoverse V1, and Graviton4 is Neoverse V2.