My remote says RC not connected while I tried connecting with both iPhone 11 and one plus 6. still the same message. Both have different wires so wire doesn't look problem to me. it is the remote. Also, It will not charge remote

Sorry to hear this, I would recommend you send the Remoter controller in for diagnosis and repair, please refer to the link below to start a repair case.
https://repair.dji.com/repair/index?site=brandsite&from=nav