For who may need it, this solved my issue:
init({
name: "ShellApp",
remotes: [
{
type: "module",
name: "remote",
entry: "http://localhost:4174/remoteEntry.js",
},
{
type: "module",
name: "remoteToolbox",
entry: "http://localhost:4175/remoteEntry.js",
},
],
});