Hey Bobito,
Hummm, had a look at this Raspberry Pi OS and it seams to be ARMHF, so maybe I gave you the wrong info.
For Raspbian, it is definitely
https://github.com/LongDirtyAnimAlf/fpcupdeluxe/releases/download/v2.2.0b/fpcupdeluxe-arm-linux since this is what I have on my Raspberry Pi 3
And I think for ANY OS on a Raspberry Pi up to 3, that's the one.
From the Raspberry Pi 4 and up, I'm a bit confused now. I'm not completely sure what the architecture is, so I can't really give you a definitive answer.
What I'm actually sure is that if you install the Ubuntu flavour, that will need the AARCH64 version. At least, that's what I remember Don saying when I asked him about it.
But now my memory is all tangled up and I don't even trust it to say that's right ARGHHHHH.
Nonetheless, for Raspbian or Raspberry Pi OS I'm defo foer sure it has to be the linux-arm version linked above, since that's what I'm using on my RasPi 3.
I now see that it's more of a mess than an helpful post, but I hope that someone else will pitch in with the correct answer for a 64b Linux Distribution like the ones listed here:
https://ubuntu.com/download/raspberry-piAnd as a side note, looks like Ubuntu now lists a Desktop version also, not only the Server version. That's an improvement
Cheers,
Gus