Your question is confusing. When you say full ATP that implies you do not mean the restricted ATP which is the typical path these days for pilots with less than 500 hours of cross country time.

Are you referring to the "Holder does not meet the pilot in commandaeronautical experience requirements of ICAO" limitation? You could get a 'full' ATP with less than 500 hours XC with that limitation if you have flight engineer time which is pretty rare these days or 135 SIC time in a single pilot aircraft under a professional development program. Do either of those situations apply?

We can try to help if you give us more information but as mentioned it is true that 61.159 and 61.160 contain the answers you seek.