Could TS tolerate being asked for a facet that doesn’t exist, instead of rejecting the call? The way we’re using programatic facets means that we don’t always have every facet - and it’s annoying have to check if a facet exists before asking for it.

We don't have a way to ignore non-existent facet fields. Can you please create a github issue for that. Happy to consider it as a feature request which we will plan into our roadmap for the future releases.