1) check if share-property 'showsnapshot' is enabled.
::> vserver cifs share properties show -vserver <vserver>
2) If not, Add it:
::>vserver cifs share properties add -share-name <share> -vserver <vserver> -share-properties showsnapshot
3) Browse by manually appending \~snapshot to the end of the share path
\\xxx.xxx.x.xx\share\~snapshot
https://docs.netapp.com/us-en/ontap/smb-admin/access-snapshot-directories-clients-smb2-concept.html
I guess, in addition to above - users should be able to simply click on the folder (go to previous versions) and read/copy the file they need it.