So that's it. All we can do is create our own base of sounds and rhythms... there is no compatibility with any well-known standard, except MIDI, which is also questionable in terms of compatibility. Although some studio MiDi files sound quite solid on CT-X keyboards, there is still no SysEx compatibility, and in DAW programs you have to resort to using the keyboard, because, surprise surprise, it is incompatible with most software.
Perhaps this forum is therefore the only oasis of insufficient support for Casio keyboards anyway.
As for my ct-x 3000, of the eight hundred sounds it "boasts of", about 20-30 are usable. The rest needs to be tweaked, as well as the rhythms, which lack "width and fullness".
On the other hand, for the low price, it is expected.