I have a Raspberry Pi 4 B. I have tried burning multiple systems on a 32 GB SD card using Raspberry Pi Imager v.1.7.4: Raspbian 10 lite 32 bit, then Raspbian 11 lite 32 bit, and then booted manually from the Raspberry Pi OS Lite (Legacy) (Buster) website. When I write the arch command in the console, I get aarch64. But when I used another old SD card (16GB) with Buster the console response was armv71 i.e. 32bit. Why did this happen? How can I write a 32bit system to an SD card?