I'm willing to guess.
Rows 1-5 AC DF = 20 J
Rows 6-35 ABC DEF = 180 Y
35ABC later replaced with toilet (given IBs map below guessing thats where the plumbing is)
Exit rows at probably 15/16.
Awkward windows at 25/26 with the rear door option not taken up (only needed for configs above 200 pax)
You can see IBs 321XlR which also has 35 row (albeit with 7 rows of 1/1 angled business here)
Hola > Iberia > Airbus A321XLRThe Iberia Airbus A321XLR is configured 14J 168MPlease note, the seat plan illustrated here while developed from an Iberia published layout of passenger accommodation diagram, has not yet been fully scrutinised by aeroLOPA so some discrepancies may be present...
www.aerolopa.com