是的，Amchart v4可以在类别名称上显示工具提示。以下是一个示例代码：

// 导入必要的库和模块
import * as am4core from '@amcharts/amcharts4/core';
import * as am4charts from '@amcharts/amcharts4/charts';
import am4themes_animated from '@amcharts/amcharts4/themes/animated';

// 初始化主题
am4core.useTheme(am4themes_animated);

// 创建图表实例
let chart = am4core.create('chartdiv', am4charts.XYChart);

// 设置数据
chart.data = [{
  category: '类别1',
  value: 100
}, {
  category: '类别2',
  value: 200
}, {
  category: '类别3',
  value: 150
}];

// 创建类别轴
let categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
categoryAxis.dataFields.category = 'category';
categoryAxis.renderer.grid.template.location = 0;
categoryAxis.renderer.minGridDistance = 30;
categoryAxis.tooltip.disabled = false; // 启用类别轴的工具提示

// 创建值轴
let valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// 创建柱状图系列
let series = chart.series.push(new am4charts.ColumnSeries());
series.dataFields.valueY = 'value';
series.dataFields.categoryX = 'category';
series.name = '值';
series.columns.template.tooltipText = '{categoryX}: [bold]{valueY}[/]'; // 设置柱状图的工具提示文本

// 添加柱状图的列模板
let columnTemplate = series.columns.template;
columnTemplate.strokeWidth = 2;
columnTemplate.strokeOpacity = 1;

// 更新图表布局
chart.cursor = new am4charts.XYCursor();
chart.cursor.lineX.strokeOpacity = 0;
chart.cursor.lineY.strokeOpacity = 0;

// 渲染图表
chart.render();

在上述代码中，我们通过设置categoryAxis.tooltip.disabled属性为false，启用了类别轴的工具提示。然后，我们通过设置series.columns.template.tooltipText属性为'{categoryX}: [bold]{valueY}[/]'，将柱状图的工具提示文本设置为类别名称和对应的值。最后，我们渲染了图表并显示了工具提示。