CUDA на ядре 5.9

Похоже, вам действительно нужно соединить любое поле, начинающееся с пробела, с концом предыдущего поля.:

$ awk -F, '{print NF}' file
21
21
21
22

$ cat tst.awk
BEGIN { FS=OFS="," }
{
    rec = $1
    for (i=2; i<=NF; i++)  {
        rec = rec ( $i ~ /^[[:space:]]/ ? "" : OFS) $i
    }
    print rec
}

$ awk -f tst.awk file
BusinessDate,SourceSystemId,IceIndexId,IceIndexName,ComponentId,ComponentReferenceType,ComponentType,ComponentName,ComponentIssuerCIS,ComponentIssuerName,ComponentWeighting,IceCurveID,IceCurveName,RiskyCurveCIS,OriginalWeighting,DerivedWeighting,indexType,cafName,indexStartDate,indexCurrency,componentCurrency
2019-09-19,ICEEUR,11260370,risky_CMBX3_AM_19HGEMAC7.usd,20173QAG6,CUSIP,BOND,GCCFC 2007-GG9 A-M,FCMT7US,COML MORT TST 2007-GG9,0.04,19063270,risky_20173QAG6_FCMT7US.usd,FCMT7US,0.04,0.04,indexCds,index_risky_CMBX3_AM_19HGEMAC7.usd,2010-02-09,USD,USD
2019-09-19,ICEEUR,11260370,risky_CMBX3_AM_19HGEMAC7.usd,61753JAF6,CUSIP,BOND,MSC 2007-IQ13 AM,Z01IYUS,MORGAN STNLY CAP I TST 2007-IQ13,0.04,19059680,risky_61753JAF6_Z01IYUS.usd,Z01IYUS,0.04,0.04,indexCds,index_risky_CMBX3_AM_19HGEMAC7.usd,2010-02-09,USD,USD
2019-09-19,ICEEUR,12345400,risky_itraxx_europe32_14.eur,XSNOREFOB258,ISIN,BOND,NOREFOB_BANCO_SANTANDER_SA,BBDERES,BANCO SANTANDER SA MADRID HO,0.008,20286090,risky_bank_bsch_14.eur,BBDERES,0.008,0.008,indexCds,index_risky_itraxx_europe32_14.eur,2019-09-18,EUR,EUR

$ awk -f tst.awk file | awk -F, '{print NF}'
21
21
21
21