On HDP 2.5 sandbox Hiveserver2 UI link not available on ambari. any ideas?
Hive Service has support for two quicklinks
It seems that you have not still enabled interactive query and so it's expected that "HiveServer2 Interactive UI" will not show.
However to investigate missing "Hive Dashboard (Grafana)" you can go to Ambari Metrics summary page and verify the presence of Grafana component on the cluster. If Grafana component is not installed then its expected that this links will also not show.