I believe I found the issue. At that point when you reach the dialog, if you pull up your PAL screen and look at your charisma it should be less than 16.
If it is, then that explains why you didn't get the choice to accept the offer or not. If it's 16 or higher and you're still getting it... then I may go bald pulling out my hair for this one lol. Also, as it so happens, that's the one particular outcome of that whole branch that I indeed did neglect to put the additional text between messaging him and waiting for him to finish to get you to your room. Based on where it is in the code, that's been an issue since the original release and never got caught 🤣. Or at the very least, didn't get mentioned to me.
The only thing you're missing with this section you hit is:
"I put my PAL in my pocket and then slid to the floor with my back against the wall and waited for Qrom to finish."
"About twenty minutes later Qrom came into view at the end of the hallway."
Qrom in his casual clothes
q "Sorry to keep you waitin'. Let's get you settled into yer new place."
q "You actually lucked out. There was only one dorm left with a vacancy and you won't even have a roommate."
q "Follow me and I'll take you there."
"I got up from the floor and followed him."
So as it is, if you do check and your charisma is lower than 16 then I would just consider this a "typo" error which will no longer be there next update or added to a patch if there are any game breaking errors.