Hi @to0simple for now, you can use the following workaround:

provide a custom VertexHandler that ignore the rotationEnabled property (mimic a true value)
use the custom VertexHandler in a custom implementation of the Graph class
use the custom implementation of the Graph class

  class CustomVertexHandler extends VertexHandler {
    // the following code is adapted from magraph v0.11.0
    isRotationHandleVisible() {
      const selectionHandler = this.graph.getPlugin(
        'SelectionHandler'
      ) as SelectionHandler;
      const selectionHandlerCheck = selectionHandler
        ? selectionHandler.maxCells <= 0 ||
          this.graph.getSelectionCount() < selectionHandler.maxCells
        : true;

      return (
        this.graph.isEnabled() &&
        // this.rotationEnabled && // this is the original condition
        this.graph.isCellRotatable(this.state.cell) &&
        selectionHandlerCheck
      );
    }
  }

  class CustomGraph extends Graph {
    constructor(container: HTMLElement) {
      super(container);
    }
    createVertexHandler(state: CellState) {
      return new CustomVertexHandler(state);
    }
  }

[Question] How to use the VertexHandler rotationEnabled #267

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