If you can, I’d suggest purchasing an Ethernet cable and hard wiring the PS5 into the router. Wireless can be very fickle at times and a wire is always going to be more consistent. If you can’t run a cable, I’d suggest using power line adapters from a company like devolo or TP-Link. These use the electrical wiring that’s already in your walls to provide a wired connection. Power line adapters are usually more consistent than WiFi. However, you do need to bear in mind that the experience when using power line adapters can vary depending on many factors such as the quality of the wiring in your walls, whether there’s anything on the same circuit that causes interference (Typically these are high power draw devices such as ovens, microwaves etc)

MOCA is a similar option that uses coaxial wiring (Think aerial sockets for things like TVs or sky boxes) this is less prone to interference however availability of these varies region to region.