Increase living space. Enter the apartment

Hello everyone I would like to make better use of the height of the living space. Currently, the subfloor including insulation is about 12cm. I could reduce this to 9cm with screed. This would give me 3cm more room height. Today the step into the apartment (i.e., from the stairwell into the apartment including the floor) is about 3cm. A step of 6cm is probably a bit big and unexpected for guests? Is there another good idea? I was thinking of an intermediate step of about 3cm in the stairwell. Barrier-free is unfortunately not an option, as there is no elevator in the building.

Is there another good idea?

Instead of increasing the step height, one could consider removing the tripping hazard and building up 3cm MORE.

Please merge both threads.

... apparently the other thread has been deleted .. I definitely can’t find it anymore.

A 6cm step is apparently somewhat large and unexpected for guests?
Is there another good idea? I was thinking of an intermediate step of about 3cm in the staircase.

I already asked in the other thread why a 6 cm step should be too large and 2x3 cm not. And what does an intermediate step of 3 cm in the staircase mean? How is that supposed to work? Please draw it.

That's roughly how I imagine it

Absolutely terrible as an entrance to an apartment.

Do you have a few pictures?
What is the floor height of the individual rooms?
Please clarify a bit more.
These small steps are more uncomfortable and dangerous than a giant step.