Also see Redemptionis Sacramentum
[65.] “It should be borne in mind that any previous norm that may have admitted non-ordained faithful to give the homily during the Eucharistic celebration is to be considered abrogated by the norm of canon 767 §1.145 This practice is reprobated, so that it cannot be permitted to attain the force of custom.”
That makes it quite clear that no one other than an ordained priest or deacon may deliver the homily, even if there is a previous law or instruction permitting it, or even if there was a custom permitting it. Again, an Anglican “bishop” may never preach the homily at Mass.