解决方法

在package.json中添加

 "vue/setup-compiler-macros": true

 记得在上面的 "node": true 后面加一个逗号

"eslintConfig": {
    "root": true,
    "env": {
      "node": true,
      "vue/setup-compiler-macros": true
    },
    "extends": [
      "plugin:vue/vue3-essential",
      "eslint:recommended"
    ],
    "parserOptions": {
      "parser": "@babel/eslint-parser"
    },
    "rules": {
      "vue/no-unused-components": "off"
    }
  },