They didn’t organise it hence why it isn’t part of their record, the organisers were FIFA representativesUEFA, the organisers of the Champions league (European Cup),and the former ECWC, do not consider any clubs record in the Fairs Cup to be part of their European record.
So, the European body says “Non”
. They have previously published on UEFA.com that it is the forerunner of the UEFA cup. They took over at that point and gave it such an original name.