@Jam.Santillan.Refinitiv , This is an ETF, the ESG score of a "fund" is provided by Lipper. If you need to access the ESG scores of funds via API, you need to use the RDP Funds API. I do not think Eikon API currently provides fund's ESG. I checked the RDP API, this ETF's ESG score is available there.
ek.get_data(my_list_of_ISINs,['TR.TRESGScoreGrade'], parameters=None, field_name=False, raw_output=False, debug=False)[0]
my_list_of_ISINs is of course list format
output ends with all NA