I'm trying to lspci > /sdc1 lspci.txt on recovery mode. What am I doing wrong? + help installing broadcom BCM4360 802.11ac network controller on debian

hardware is a nuked MacBook Pro, Intel Core i5-4278U @ 2.60GHz, model A1502 (EMC 2875), Retina Mid-2014 13"

I tried to install debian 12.5 from a live usb on this computer. On the network page of debian's installation GUI I get this message:

No Ethernet card was detected. If you know the name of the driver needed by your Ethernet card, you can select it from the list.

so I logged in to recovery mode and executed

sudo lspci -vnnk -s 03:00.0

that returns

network controller [0200]: broadcom inc. and subsidiaries BCM4360 802.11ac wireless network manager adapter [14e4:43a0] (rev 03)

there is more information that I wanted to save to a lspci.txt file on the live usb (sdc1) to share with you, but I failed the syntax.

Why I want to do this: installing debian, on the GUI's networking page there is a candidate with this exact specification (broadcom 802.11ac wireless network manager), but I cannot install it because I don't have wifi or an ethernet cable, so I'd have to download this package from this computer I'm using now and copy it to the live usb to install alongside debian 12.5. I just wanted to print the whole command just in case it's helpful.

ETA: how do I install rpm fusion repos on debian? I only found instructions for fedora and rhel https://rpmfusion.org/Configuration

thanks