I have a NFS server on Ubuntu 20.04. My /etc/exports looks like
/home/user2 10.4.200.2(rw,sync)
/home/user3 10.4.200.3(rw,sync)
On a Windows 10, I mount the folder using "Connect a network storage" (Sorry, it might not be an accurate translation because the system language is not English). I enter in the folder field
IP_of_the_server:/home/user2
However, the remote NFS storage appears in read-only mode. Indeed, I cannot create nor delete files.