Can i use my Netgear C7000v2 as just a router or LAN Switch?

> [...] I usually prefer hooking up my PC and PS4 via LAN. [...]

   What's stopping you?

> Getting a LAN switch for 20$ would solve my problem. [...]

   If your actual problem is a lack of LAN Ethernet ports, then that
might be the best course.  However, a wireless access point can be used
as a network switch, whether or not you use (or disable) its radio(s).
See, for example:

      https://community.netgear.com/t5/x/x/m-p/1463500

That's written for a Netgear C6300-as-WAP, but the steps are about the
same for any other router (any make/model) which lacks a one-step WAP
option.

> [...] I believe if there was a setting to use it just as router that
> would solve my purpose too.

   The lack of a WAN/Internet Ethernet port might make that difficult.
And, cascading multiple routers might be a poor ides, even if you could
do it.