The reason why it doesn't show up is because your APU is a OEM Processor which AMD doesn't have any driver for.
Here is what AMD has for your laptop APU processor: https://www.amd.com/en/support
The closest Laptop driver is for the A4-9120 APU Processor. It might or might not work. It is best if you go to your laptop's Support site and download their AMD driver for your A4-9125 APU OEM Processor.