Oracle’s cloud servers are OK. Their physical servers have 160 cores (2x Ampere Altra Q80-30, 80 cores/each), 1TB RAM, and 100 Gbps network bandwidth (2x 50Gbps cards). They can also cut these servers into VMs and offer these smaller VMs.

The software story is OK by now. I had little to no issues with that aarch64 Linux in their VMs. I didn't need a lot though, only mysql, asp.net core runtime, and related OS setup (SELinux, built-in firewall, etc).