Well that's utterly weird. I've got nfs-ganesha on a couple servers at home, has worked fine mostly but i also get that it's basically not getting updated properly anymore. Yeah, i know i need to go back to the kernel server but don't want to fight it, and honestly ganesha is a little nicer once you get it.
Older almalinux aystem is quite happy, reading data no issue. Using nfsv4.2
Fedora 43? In the last day or two has somehow gone utterly wacky and ia throwing remote i/o errors. Tried a couple things, nothing fixed it. Rebooted the server thinking that was it, nope.
Switch to nfsv3? Content again.
Geez luiz, i need a better network share protocol me thinks.