In Revit software, you can add link files for standard layers, and then use the copy and paste function to copy the link files by elevation to quickly establish a high-rise model. After saving, you can open it again to browse the high-rise model normally.But the copied model cannot be displayed in iTwin.
The steps in Revit are Modify tab > Clipboard panel > Paste drop-down > Aligned to Selected Levels.
You can refer to https://help.autodesk.com/view/RVT/2021/ENU/?guid=GUID-4E8562EC-38C4-485E-A86D-D459096187AF.
This will be marked as will not implement for the time being. I've asked for an example to allow some investigation to see if we can meet users expectations, but they have not provided us any examples. If we get an example, we can re-evaluate.