If you Dell Support AMD Drivers are very out-dated then you can try and use AMD Basic laptop Graphics driver. Otherwise it is best to use Dell's AMD driver instead if possible. It is 100% compatible with your laptop.
Your R5 m335 isn't supported by AMD for updates anymore. The last AMD driver for your GPU card is from 06/21/2021: https://www.amd.com/en/support/graphics/amd-radeon-r5-series/amd-radeon-r5-300-series/amd-radeon-r5-...
Upload 2 GPU-Z images showing both the Intel APU Integrated Graphics and AMD R5 m335 Graphcs.
In a laptop you must have the latest Intel Graphics Driver, CHIPSET, & BIOS installed, Plus Windows must be fully updated via Windows Update.
When you mentioned the GPU has 512MB is that the Integrated or the R5 m335 GPU card?
In some laptop BIOS you can change the amount of vRAM that the Integrated Graphics uses from System RAM. But if there are no BIOS settings then that means the amount of vRAM on your Integrated Graphics is fixed and can't be changed.
The R5 m335 is considered to be a Discrete separate GPU card and it has a fixed amount of vRAM on it.
