That is normal when you use AMD Generic drivers for your laptop. It will work the same and is compatible with the laptop's GPUs.
If you want the laptop to show the correct GPU then you will need to download and install Dell's own AMD driver which are customized to work 100% in your laptop and is able to use all the features of your laptop. Although, AMD drivers are compatible, They are not customized like Dell's AMD Driver to use all the features of your Laptop.
NOTE: If your laptop has a AMD APU Processor, you will need to download only the APU Driver which will automatically install the Discrete GPU card's driver if applicable. But if you have an Intel APU, then you just need to download the Discrete GPU card driver.