Second router as an Access Point can it be used as switch ?

Dear folk

Second router is configured as Access Point to extended WiFi for mobile connection at home and it is connected wired to a first router via a wall socket

Can the second router (now it is setup in Access Point mode) be a switch for 2 desktop to be connected to it via Ethernet cables ?

I have only one RJ45 connection on a wall and yes I am aware that if the desktop has wireless network card that will help

Thx