All types of models for use in teaching/learning or even for commercial use, like planes, trains, buildings etc. can be made with exceptional details using a CNC machine.
A few examples from the web are given here for reference and motivation.
A complete castle made using a 3-Axis CNC. Multiple 2D Designs were made and then cut on plastic sheets to make amazing details.
Read More here – https://www.cnc-step.com/architectural-models/
Architectural & Structural Models are also possible with the right design and the right bit.
See Some Great Examples Here – https://www.modellarchitektur.at/projekte/modellbau
A model plane made using both a CNC & a 3D Printer
The internet has a lot to offer as there are several DIY ( Do It Yourself) innovators who share their work and sometimes even designs.
Just search and you are certain to get a few hits.
Here are a few resources to get you started with designing and cutting your own projects. Laser cutting projects can also be modified and used for CNC’s.
1) 3Axis.co (Free) – https://3axis.co/laser-cut/toys/
2) MakeCNC (Paid) – https://www.makecnc.com/browse-store/premium-patterns/
3) DesignsCNC (Free) – https://designscnc.com/category/animals/