[BUG]Babel safe navigation operator invalid token

[Sioweb]

Describe the bug

Package @shopware-pwa is using the safe navigation operator or elvis operator, and this will throw an error in my new installation.

I've fixed this for me now with @babel/plugin-proposal-optional-chaining and @babel/plugin-proposal-nullish-coalescing-operator. webpack/webpack#10227 (comment)

yarn add @babel/plugin-proposal-optional-chaining @babel/plugin-proposal-nullish-coalescing-operator --save-dev

nuxt.config.json

build: {
    extend (config, ctx) {
    },
    babel: {
      plugins: [
        ["@babel/plugin-proposal-optional-chaining"],
        ["@babel/plugin-proposal-nullish-coalescing-operator"]
      ]
    }
  }

PS.: not sure if @babel/plugin-proposal-nullish-coalescing-operator is required for the solution.

Dont now if this is a good solution, but it works for me now.

Additional context

[mkucmus]

the babel plugins listed above were added to the project by default, so the optional chaining is working even in vue components (except the secion).