Data Tables are read only, what can I use that's like it, but can be modified?

This is definitely a possible solution, but it feels like a lot of re-engineering, creating systems and duplicating data.

Yeah, this is doable but, again, feels like a lot of re-engineering.

Is there really nothing like how a database would operate in this engine? That feels bizarre to me.
Great responses, though, thank you. I could use those solutions, I just wish there was something like data tables with updatable fields, tbh.