One challenge with cutting small parts is that they may fall into the machine through the cutting table.
Some lasers have a cutting grid that is fine enough to prevent this.
Here’s an example of Squirrel model airplanes falling into the laser through the cutting table.
The trick is to build a tray (which I have been working on) to load the raw wood. the tray can support the parts so they can’t fall down. Also with two trays the jobs can be switched in and out of the machine quickly.
For one-of or adhoc, you can put scrap material underneath the workpiece: