When getting "Search" field not available under "Key Management" tab on dashboard UI.
Could be issue due to gateway working in hashed or non-hashed key mode.
In hash key mode, dashboard will show keys as hashed and not the actual keys.
In non-hash key mode, dashboard will show actual keys along with hashed keys.
If keeping keys in hashed mode, set following in gateway and dashboard config so that both works in hashed key mode.