It seems Wesley affirmed the real/spiritual presence but rejected transubstantiation (see first quote)
[N]o such change of the bread into the body of Christ can be inferred from his words, “This is my body.” […] [T]hat they are not to be taken literally is manifest form the words of St. Paul, who calls it bread, not only before, but likewise after, the consecration […] [a]nd accordingly these elements are called by the Fathers, “the images, the symbols, the figure, of Christ’s body and blood.” - Popery Calmly Considered, in Works, v. 5, 811
“I haste to this Sacrament for the same purpose that St. Peter and John hasted to His sepulchre; because I hope to find Him there.” - Poetical Works, III, 194–95
“I come then to God’s altar, with a full persuasion that these words, This is My body, promise me more than a figure; that this holy banquet is not a bare memorial only […] in what manner this is done I know not; it is enough for me to admire.” - Poetical Works, III, 194–95
“And thus His body and blood have everywhere, but especially at this Sacrament, a true and real presence.” - Poetical Works, III, 197