The ICU mappings files have entries for U212A in the following files:

    gb18030.ucm
    ibm-1364_P110-2007.ucm
    ibm-1390_P110-2003.ucm
    ibm-1399_P110-2003.ucm
    ibm-16684_P110-2003.ucm
    ibm-933_P110-1995.ucm
    ibm-949_P110-1999.ucm
    ibm-949_P11A-1999.ucm