Ryan, I think you are experiencing https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/2059197 which is a regression on focal from a previous update that also tried to address the version negotiation. There is a new nfs-utils package in focal-proposed to address that, would you mind trying it out? The instructions are in that bug.
** Package changed: util-linux (Ubuntu) => nfs-utils (Ubuntu) ** Changed in: nfs-utils (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2063381 Title: NFS Client can't mount via NFS version 4.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nfs-utils/+bug/2063381/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs