FREMM/Constellation would be general-purpose ships, which could be used for a lot of different tasks - also combined with drones. They have the size to be upgraded with new systems.

The ships, which are currently built to deploy drones, are frigates (Mogami class) or look at least like frigates (Victory class).

What is the difference between a "Small Surface Combatants" which can deploy and control drones, and a frigate? I think that is only a question how the ship is equipped and how versatile and spacious the design is.

If such a ship should be capable to be deployed e.g. against China, it need a certain size, seakeeping capabilities, and range. I.e. a modern frigate...