NFS Exports exports.d files not displayed

Operating system: DietPi 7.x (Debian Linux 10)
OS version: Webmin 1.979

Hi, I’m running Webmin on DietPi, that uses a dietpi.exports file in /etc/exports.d however I can’t see anyway to include the exports.d directory through the Webmin interface. Are there settings in a config file that I could alter so that Webmin recurses the /etc/exports.d sub-directories, or a setting in Webmin configuration screens that I’ve missed ?

Cheers.