In the earlier releases I actually did release a .bin file for the PICO builds. When there was only one SD_Boot bootloader, they might have worked with it. But I’m not sure if they had the flash locations changed properly to match, since that info changed a few times. Then things got complicated when the bootloader changed, and now there’s an even better bootloader in the works that doesn’t need to use .bin files at all but can load .uf2 files directly. Sounds like it is already working for the PICO, but the PICO2 support is still a work in progress.
I haven’t been using the PICO module in my PicoCalc and have been using a PICO2W. So I don’t really have a way to test the PICO builds, and with the fragile nature of the screen, I’d rather not swap out modules constantly, even though I taped down my replacement screen to lessen the chance it would break.
Once the new bootloader is available and working for both PICO and PICO2, there won’t be a need to use separate .bin files at all. So I was planning to just wait it out and not even bother with the old .bin method that will eventually be going away.