Most diagramming solutions are like freehand drawing tools. Besides text-based diagrammers (Mermaid, PlantUML, D2Lang) what are good diagramming components for

Most diagramming solutions are like freehand drawing tools. Besides text-based diagrammers (Mermaid, PlantUML, D2Lang) what are good diagramming components for integration in a web front-end that help with strict, validated diagramming? Restricted tool pallet shapes and commands. I.e. defining that a "Concept Map" only has Concepts and Relationships, where the latter must be connecting 2 concepts for the diagram to be valid. Or an "Event Storming" diagram that only has the appropriate sticky note types that must be layed out appropriately on a timeline. Bonus points for supporting collaborative editing. React Flow [0] until now is the component that's closest to this. Others, Excalidraw [1] and Tldraw [2] may be integrated to support this, with some additional effort. [0] https://reactflow.dev https://reactflow.dev [1] https://excalidraw.com https://excalidraw.com [2] https://tldraw.com https://tldraw.com