Open the two files side by side and drag and drop or copy/paste.
Multipage InDesign pasting into a (new) InDesign file?
You can use the Place command. Create the number of required pages. File->Place (Tick show import options). Select your InDesign file. Select the page range (or all pages). Select the crop to option. Select the correct layers, if different from what is visible and go ahead.
You can place page per page on your document at the required position. Works fine, but not as easy as the "placeMultiplePagePDF" script.
But may be, there is a custom script to be installed and working like the placeMultiplePagePDF for InDesign files.
As Uwe mentions, use the Content Collector, it is often overlooked as a useful tool, but it is made exactly for this kind of work.