Old cast steel drainage pipe with HT pipe

Hey, I have an old floor-standing toilet connected to the floor pipe where a cast steel pipe is installed. Now I want to install [geberit], which is now handled with HT pipes. My 110 HT pipe has a lot of play in the floor recess where the steel pipe is. Is there a gasket to put into the steel pipe so that the HT pipe no longer has play, and with which silicones or adhesives can it then be fixed to the HT pipe?

If [Gußrohrmuffe], then you need a set of [Mengeringe].

[Gußrohrspitzende] (without [Muffe]) [konfixverbinder].