No network/wifi driver for cachyos installation

Hello, I am new to the Linux world. The problem I have is that I changed my hardware a few days ago motherboard, CPU, memory. The board is an ASUS Strix X870e-e with the realtek 8126. When I boot from the installation stick, I have no connection to the internet because the network card is in io: loopback.
Have already downloaded the driver from realtek but don’t know how to install it. Searching the internet didn’t help me.

Thanks for the help

i have tried it with the yay command when i should enter it as you have described it above but i get this error.

You are trying to use yay, which is not there. You can install yay, but you can also use the pre-installed paru. They both do the same thing, for paru you have to continue with q.

https://wiki.archlinux.org/title/AUR_helpers

I tried it with paru but it always tries to connect to the database on the network. I think you can’t install anything on the cachyOS installation stick without rebooting which resets everything to zero. either I have to get a compatible wifi stick and do it from there or it doesn’t work at the moment.

thanks for the help, i have already found a suitable wifi stick. in the arch forum there is a small database i call it where out of the box sticks are listed

Small update. I got the Wi-Fi stick and everything worked. Cachyos was installed Ethernet and Wi-Fi works now too.