For working around this, I've created a multisearch which uses nested filtering instead and have a Take(0) on it. This way I will now the total matches. I don't really like this solution. It would be handy to have nested filterfacets.
I added a feature request for this a while ago
EPiServer Find 11 Client API introduced nested filtering. This is great, but I'm also looking for nested facets. Is this possible? I've looked at the following NuGet package: https://github.com/x2find/Nested2Find. This package however, doesn't contain any nested filterfacet function.
Are there any other APIs that I should use? Am I missing something?