Asus Tuf Gaming fx505dy

CPU
The CPU is an AMD Ryzen 5 3550H with four cores.

Graphics
The CPU provides Radeon Vega Mobile graphics, and there is a Radeon RX 560X GPU (List_of_AMD_graphics_processing_units) with 4Gb of dedicated memory. Follow the instructions in the amdgpu article.

Wireless
The rtl8821ce wifi is not supported by the 5.3.1 kernel. The simplest way to enable it is to download Tomás Pinho's driver for Archlinux, and copy the directory tree into the corresponding directory of gentoo-sources.

Run make nconfig and select the option:

Device Drivers ---> [*] Network device support ---> [*]  Wireless LAN  --->   Realtek 8821C PCI WiFi

Then compile and install the kernel.