i can change the following lines:

 "build:client": "rimraf dist/client && webpack --mode development --progress --config config/webpack.client.js",
 "build:server": "rimraf dist/server && webpack --mode development --progress --config config/webpack.server.js"

yet besides changing development into production i am not sure which approach would be best suited to debug a module federation application

EDIT:

I found, changing mode to development not only in package.json but also within webpack configuration as well as applying

 optimization: {
 minimize: false
 },

to the shared webpack config has been helpful.
Please post more if you know better ways