Oh, x86 refers to x86-32, as I mentioned in the title.
'More compatible' means that this version will not break other extensions that might depend on fuse3, and it is also suitable for more older hardware.
Because in the context of Linux kernel 6.12 being the last LTS version to support i686, newer software versions are not necessarily suitable for old hardware, since some software has stopped conducting thorough compatibility testing for 32-bit platforms.
I know that the x86-32 repository has fuse3, and when i running some AppImages, a warning is output indicating that the fuse3 version is too low and some features are disabled.