Hi Divyanshu singh,
Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.
We have observed similar issue in the forum, please find the below link for your reference.
https://zcusa.951200.xyz/en-us/answers/questions/779242/ionq-provider-not-found?source=docs
If you still face any issue, please let us know in comments. We are happy to assist you.