Laptop table?

Is there some kind of laptop or table that I can put on my desk with space underneath for a keyboard and mouse? Unfortunately, I don't have that much space because of that

That doesn't sound sensible. There has to be another solution. A third level for a laptop or a screen is not recommended.

Depending on the workplace and situation, laptop or notebook arms or brackets are offered that can be swiveled away:

https://www.reichelt.de/notebook-tischhalterung-notebook-d100-p203581.html