From other (Linux client) machines on my network, the 'mount' command snippet shows NFSv4.2 is used:
I appreciate your concern about size and complexity, and the resource-limitations that some devices may have. But perhaps there is a user-selectable alternative that would allow some folks with more device-resources to meet this need?
But still... 14 years since RFC-3530 and NFSv4 was introduced... :-O
Thank-you,