How can I fix this Published Cache status?

Tap the Rebuild button? 😉 Okay, I'll stop being flippant! I don't know, but it's counting the number of nodes, vs the number of NuCache lines, so that's where there's a discrepancy. Usually we see people doing programmatic imports and not refreshing the cache while doing those. Check the

Verify*Cache

methods, they could point you to what could be wrong. https://github.com/umbraco/Umbraco-CMS/blob/contrib/src/Umbraco.PublishedCache.NuCache/Persistence/NuCacheContentRepository.cs

Pushed all the buttons so will have to dig into that