The program compiled has AMODE(31) RMODE(ANY).
This does not answer the question about whether or not the program can use storage above the line (compile option DATA(31) tells you that).
Are you aware that many sites use JES exits to restrict the amount of storage allocated when a programmer uses REGION=0M? If not, then you need to learn that. And the question STILL remains -- how much storage is the program getting already? If you did know about the restriction, then you should not have given the answer you did.