Did you ever figure out a way? I am having the same issue.
I had no trouble accessing samba shares from Mac OS or Windows clients, but in CachyOS I can see my Zima OS server but it will not ask for credentials nor can I figure out a way to give them to show me any of the shared folders.
I followed these steps here to enable SSH on my Zima OS NAS.
Then in Dolphin I was able to use sftp:// instead of smb://, which operated as expected. If you have multiple drives of shares, you may have to view hidden files to navigate to them. Using control + H to see hidden files in Dolphin, you can now navigate to ./media to see other drive shares.
`Hope this helps you or anyone else, it seems to be working for me.
had the same issue on my first use of cachy, I had to install samba package and related dependencies. The cachyos-samba-settings package provides default configurations and enables the smb and nmb services, then create and add credentials to the samba credentials file and mount drives with fstab. there was a guide on the cachyos forum for it I followed. haven’t had to do anything else since and the drives are always auto mounted at boot.