Thanks, yes, I mentioned OpenFaaS in a sibling and find it very interesting as a possible standard, but realistically there isn't currently a way to deploy OpenFaaS compatible functions to hosted providers (I actually couldn't find anyone offering a hosted OpenFaaS service).
So currently, one would have to maintain the OpenFaaS control plane themselves, which takes away most of the benefits for an end user using serverless (would still have ops and no multi-tenant cost benefit).
https://knative.dev/docs/
https://krustlet.dev
https://www.openfaas.com/