Can I connect a new wireless router to an existing wireless home network (as an access point, I guess?) without having to connnect an Ethernet cable between the two? - eviltoast

To explain: I have Starlink (only option where I live) and recently got a PlayStation Portal (remote play device). The Starlink router isn’t going to work for this since the PS5 and Portal are connected wirelessly, which causes too much latency and lag. The router isn’t all that to begin with, either.

Since the PS5 and Portal connect over the router and not the internet, my plan was to utilize a separate router for that. However, it turns out that Sony (for whatever silly reason) requires an internet connection just so the Portal can log into PSN and the all gaming communication is through the router.

So, I purchased a wireless router (TP Link AX1800) hoping I could use that as a wireless access point that connects to the Starlink router- so the Portal can log in- but then have the PS5 hardwired to the TP link and the Portal wireless to the TP Link for their communication.

I’m having a heck of a time getting that to work. I switched the TP Link to Access Point mode, but that requires an Ethernet cable attack to the Starlink router. Is it possible to set up this router- or any other- so that I can connect PS5 (Ethernet) and Portal (wireless) and have it wirelessly obtain an internet connection from the Starlink router?

Thanks in advance!