[Chartjs]-React chartjs-2 – Increase spacing between legend and chart

You can use a custom plugin:

ChartJS.register({
  id: 'customSpacingLegend',
  beforeInit(chart) {
    // Get reference to the original fit function
    const originalFit = chart.legend.fit;

    // Override the fit function
    chart.legend.fit = function fit() {
      // Call original function and bind scope in order to use `this` correctly inside it
      originalFit.bind(chart.legend)();
      // Change the height as suggested in another answers
      this.height += 15;
    }
  };
});