Problems with SMB access to My Cloud Home on iPadOS

I cannot access Public Folder on MCH on iPad via SMB.
Android and Windows are working fine

what errors are you getting???

Content Unavailable
The folder contents could not be displayed because of an unknown error

I am getting same error on both of my iPads and iPhone

is the home folder of the content locked or any of its content and is port forwarding enabled or network sharing enabled???

I can access the private share on MCH without any problems, but I am getting problems with the Public Folder.
UPNP is already enabled on my router so I don’t need to manually do port forwarding.
I don’t think the problem is with my network setup because I can browse Public Folder with other devices its just that with Apple devices I am getting this error