importing from Lightroom Classic to InDesign

It's best to use Place to import images. While drag and drop works well (the whole Adobe suite is built to enable it), Place gives more control and is slighly more reliable.

ID doesn't care what app created or last managed an image. As Lukas notes, though, it does not import some formats, mostly RAW, and it's a good idea to optimize images (sometimes duplicates of master images) for their end use through ID. You can pull in very large master images and then export to modest print or digital documents, and that's fine for smaller projects, but if you're going to do an image-heavy document or book... export versions of your images already pre-scaled and in the right color mode.

—

InDesign does not allow Raw for Dng files so you would need to export them to aformat indesign accepts, this can be JPG, TIF or PSD.

There is a script to make a contact sheet from Bridge, and Bridge let's you access files from LightRoom. If the files are in various folders and/or collections coould it help to use a key word so that you can easilly find them in Bridge? There is a Place in InDesign command from Bridge, but I think that the smoothest work flow is to collect the images in a folder, and then place in InDeisgn, possibly using a script like this one https://creativepro.com/the-ultimate-contact-sheet/

I hope some user that has Lightroom in their workflow can give you a better answer. Lightroom is great for a photographer, but the files need to be "developed" for them to be placed in InDesign.