Refer to Open PermID FAQ page in the question "What kinds of entities are supported?", its coverage doesn't include fund.

Moreover, when I used other tools, such DataScope Select or AppStudio - Web SDK, LP68378811 can't be mapped to other instrument types, except LipperID. The following is the output from the Symbology Plugin in AppStudio - Web SDK.

{
      "LipperIDs": [
        "68378811"
      ],
      "RICs": [
        "LP68378811"
      ],
      "bestMatch": {
        "RIC": "LP68378811",
        "lipperID": "68378811"
      },
      "symbol": "LP68378811"
    }

I think that this is why you are unable to search this RIC from PermID.org.

Thanks. That means I was trying to search a non-equity quote/RIC.

I don't quite get your point when you mention about DataScope Select and App Studio.

This RIC LP68378811 do have a permID of 21591485256. I get it by typing "LP68378811 META" in Eikon.