Raspberry Pi Trixie

https://www.raspberrypi.com/software/operating-systems/.

More precise: 

https://downloads.raspberrypi.com/raspios_lite_armhf/images/raspios_lite_armhf-2026-04-21/2026-04-21-raspios-trixie-armhf-lite.img.xz

For my purposes, I've downloaded the 32 bit version.