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Antoine According to the specs, the wifi/bluetooth adapter is a "Realtek Wi-Fi 6 (2x2) and Bluetooth® 5.2 combo card (support for Gigabit data rates) Compatible MU-MIMO". I can't tell what driver it uses, but if the 5.13 kernel (Solus ISO) does not have the right driver, the 5.15 (after update) kernel probably will.
So your wifi card might not work until the updates are installed. If the laptop's wifi doesn't run under 5.13, an easy workaround is a cheap USB to Ethernet adapter. That will allow you to connect to your router and run the updates, which will bring the kernel to 5.15.
The reason I said "cheap" is because the cheap adapters are usually driverless, which is what you want. Download speed is less than you might get with a more expensive adapter, but you don't need that just to update. I use USB to Ethernet adapters to wire my laptop directly into certain routers (wifi is disabled on those routers) at the railroad museum, and they work fine.
I wouldn't pay attention to the Manjaro recommendation. Just get Solus up and running.