In en route -= the specification required is RNAV 5 (there is no RNP 5 specification in the ICAO PBN Concept).
In some terminals, e.g. Amsterdam and Paris, RNAV 1 is required for operation and SIDs and STARs (with conditions attached).
On the approach, in the Final Approach Segment, an RNP APCH (of which there are four flavours) we're in the area of RNP 0.3 - though that is a slightly tricky statement when SBAS is used as it is angular not linear). On RNP AR APCHs, which are few and far between - there scalable RNP is used ... can go down as low as 0.1; case by case basis, per operator, per runway ....
Hope this helps.