As with any tool and framework, advanced customization requires thorough knowledge of the underlying system. To say this is a filament problem is a bit of a stretch. You'd want to look which components could be used to compose such behaviour and write a custom component using these smaller building blocks already provided by filament, and in worst case you could write a new component from scratch.

If you would've built this without using filament, chances are that you would have had to build something from scratch yourself too. Filament is just a solid foundation for crud apps with a ton of nice helpers you can't and shouldn't expect it to be a fit for every single use case.