How to track statistics for multiple sites in one Google Analytics report?

Question

Google Analytics

Good afternoon. I need to track a user's full path across multiple sites in a single Google Analytics report.
For example: there is a manufacturer's website with links to dealers' websites. You need to see the behavior and path of the user who has moved from the manufacturer's site to the dealer site in one report. Or track the path and behavior of the user who immediately went to the dealer's website.
What is the best way to do this using Google Tag Manager?
Can this be done by placing the Google Tag Manager container code on the right sites without creating new "Resources" in Analytics?
Or is it possible to view statistics for several "Resources" in one report?
Do I need to use cross-domain tracking for this ?