Oxid 6 - Settings -> Core Settings -> System -> Modules gone?

I’m trying to implement this fix: https://github.com/OXIDprojects/mude_lazyloading but in OXID6 there is no “Settings → Core Settings → System → Modules” menu any more to add admin core entries. The guide in this GitRepo says:

I attached a small module activating lazy loading. Just put the file to your modules folder and add a line in admin module entries like this: “oxcategory => mude_lazyloading” for each class you want to activate lazy loading.

So where should I add “oxcategory => mude_lazyloading” in OXID6 to make it work? Does this module work with OXID6?

it was originally made for version 4.4 and due some major changes in last 5 years, it does not work with oxid 6.

Ok, thanks.

More info about writing modules: https://docs.oxid-esales.com/developer/en/6.0/modules/skeleton/metadataphp/index.html