Run NFSv4 w/RDMA on Rocky v9.5

I'm trying out RDMA on NFS and noticed that it does not seem to work with NFSv4:

[grant@host ~]$ sudo mount -t nfs -o rdma,proto=rdma,vers=4 10.99.99.98:/ifs/rdma-test /mnt/powerscale_rdma
mount.nfs: Protocol family not supported
[grant@host ~]$ sudo mount -t nfs -o rdma,proto=rdma,vers=3 10.99.99.98:/ifs/rdma-test /mnt/powerscale_rdma

nfsv3 loads up and runs just fine, but nfsv4 gets you mount.nfs: Protocol family not supported. [This answer](https://unix.stackexchange.com/a/749996/240147) on [NFS4, insecure, port number, rdma contradiction help](https://unix.stackexchange.com/questions/749990/nfs4-insecure-port-number-rdma-contradiction-help) seems to indicate it could work, but it's not really clear how. Is there a way to run NFSv4 with RDMA?