Generating a secure bitcoin address offline with Raspberry Pi 4

I'm looking to create a new bitcoin address in the safest way possible using my Raspberry Pi 4. There are some straightforward steps, but I'm a bit lost on a few details to get it done right. If anyone here has experience with this, I'd really appreciate your help.

Raspberry Pi is just computer with smaller physical size and ARM processor. So you could install OS on the microSD and add software wallet you prefer to use to that microSD and turn on your Raspberry Pi 4. For extra security, verify integrity of the OS and wallet software you download.

Easy way is to install Raspberry Pi OS or Debian and then install Electrum or some other wallet (Sparrow, etc) to generate address. Just make sure you have wifi turned off and don't have any internet cables connected to device. Old Raspberry Pi Zero is perfect as small airgapped device (no WiFi or Bluetooth), that is why DIY project Seedsigner is using it as their main device. This is cheaper and better way in my opinion: https://seedsigner.com/

on github uploaded paper wallet generator script that uses purely JavaScript, it does not require connection