@ameet0121
RNP10 is the exception to the rule.
In general RNP can be used with or without radar coverage as the onboard monitoring and alerting take the place of the outside agency. RNAV usually requires radar coverage of some kind. However, ICAO decided (due to some lobbying) not to re-name RNP10. It is in fact an RNAV specification but named RNP because RNP10 was already implemented using the old rules when the new standards were drawn up. The idea was cost saving. They were convinced the the cost or reprinting simply for what is effectively a title change was not worth while. So, where you see the title RNP10 you should understand it as RNAV10.
Do you have a copy of the PBN doc? This is explained in there.
Here is the intro to the RNAV10(designated RNP10) chapter in Vol 2
This chapter addresses the implementation of RNP 10 to support 50 NM lateral and the 50 NM longitudinal distance- based separation minima in oceanic or remote area airspace. This guidance has been titled RNAV 10 for consistency with the other chapters in this manual. This designation and version of the material do not change any requirements, and do not affect operators who obtained an RNP 10 authorization from their relevant State regulatory authority. RNAV 10 does not require on-board performance monitoring and alerting. However, the designation of the airworthiness and operational approval as well as airspace/route designation remains “RNP 10” in order to “grandfather” the present publications and extensive approvals. Recognizing the extent of existing airspace designations and operational approvals under RNP 10 designation, it is anticipated that any new airspace designations and aircraft approvals will continue to use the “RNP 10” term while the required PBN application will now be known as “RNAV 10.”