Created attachment 186306 [details]
Here you can see that Dolphin thinks that there are no permissions and I can't create folders via UI, but via console I can do it.

We have the network storage based on Arch Linux, on which a directory with shared access via NFS has been created.
The local owner of this folder - user with UID 1000 and GID 1000
Folder permissions are 755

$ ls -la /mnt/vfxserver01/
drwxr-xr-x 4 root   root      4 авг 24 23:13 .  
drwxr-xr-x 6 root   root   4096 июн 17 14:46 ..  
drwxr-xr-x 3 1000   1000      4 окт 29 00:34 Projects  
drwxr-xr-x 4 1000   1000      5 окт 29 02:37 Trash

The NFS options for this shared folder are as follows (all users work in the storage from user 1000):

$ sudo exportfs -v
/mnt/vfxserver01 
               <world>(sync,wdelay,hide,crossmnt,no_subtree_check,mountpoint,anonuid=1000,anongid=1000,sec=sys,rw,secure,root_squash,all_squash)
This folder is open for shared access over the network via NFS and is mounted on all workstations in the local network and mounts on bootup into the /mnt/vfxserver01 folder.

On workstations in the local network, the storage is mounted via the systemd service.

$ cat /etc/systemd/system/mnt-vfxserver01.mount    
[Unit]  
Description=Mount storage  
Wants=network-online.target  
After=network-online.target  
Before=remote-fs.target  
  
[Mount]  
What=192.168.0.10:/mnt/vfxserver01
Where=/mnt/vfxserver01
Type=nfs  
Options=_netdev,hard,intr,noatime,nodiratime,rw  
TimeoutSec=10  
LazyUnmount=true  
ForceUnmount=true  
DirectoryMode=0755  
  
[Install]  
WantedBy=multi-user.target

All users can work, create, and delete files and folders in remote storage without any problems using any program except Dolphin.

For some unknown reason, Dolphin believes that users do not have the rights to make changes to storage and therefore does not allow them to create, delete, or change files and folders.