Screed block "edit"....

I am new here and would like to introduce myself briefly. "Woman alone on the construction site," 50 years old, have been sitting on a - in the truest sense of the word - major renovation for four years. Now my simple question. From when can I drill a hole in concrete screed to fix a plug? So, to make it more understandable, with this screed block I have separated two rooms - which actually were two rooms forty years ago - only in the substructure again into two rooms. In the upper floor covering, it then seamlessly goes from one room to the other. I am aware that screed for floor covering needs at least 28 days. But I only want to insert six plugs to attach a plasterboard stud frame. The two rooms will then be separated by a plasterboard wall with a round arch. I made the screed three days ago. Nothing really holds in wet soft stuff. But maybe someone here in the forum can tell me from when something like that is possible? Thanks Ulrike

Well, so far I have 11 "likes" according to this weird circle with a "thumbs up" in it. Luckily, I'm not on F.... But ... is my question too stupidly asked or am I too stupid? On my "construction site," quite a bit of shoddy workmanship has fallen on my feet. Three cm of Styrofoam and three cm of top screed, just as an example. Now there is a new build-up coming, and on this occasion with underfloor heating. Sometimes I could really use some help with questions that might be very simple for others. Thanks Ulrike

You have 1 like from user ... I personally can’t help you because I have no idea about it. I haven’t been around that long either, but might know something about it. He knows a lot. Maybe he can help you further.

When the screed has set for 48 hours, anchors will hold in it. Do not confuse hardened with dried.

I also think hardness is not really the issue, I would be concerned about "dryness." Since drywall is equipped with mineral wool, and moisture is coming from below the component ... hmm

No, then everything is fine.
For now, only the one row of studwork should hold, so that I can divide the rooms and make "Bambule" in the divided half (old reed ceiling down,...). I still have to sleep somewhere. It’s already dusty enough everywhere. The screed itself will initially stay in the "fresh air" and still has time until it is "completely" dry. Finally closing up the wall will take a while. The complete renovation under my own rear end is already getting chaotic.
Ulrike