According to CPU World the Ryzen Mobile 3300U is a 12 nm APU Processor and so does AMD website:
Second it will be extremely helpful to know the EXACT MAKE & MODEL of your Laptop?
If it possible your Laptop OEM is preventing it from boosting so high to prevent overheating. I would check BIOS and see if any CPU Boosting type settings are disabled.
EDIT: Post CPU-Z showing an image of your APU processor. It is possible it could be a error in CPU-Z. I would try to verify it with another diagnostic app to see if it also says it is a 14nm processor.