Ordinarily a priest presides. A deacon may preside, but obviously not for a funeral Mass:
151. The priest is the ordinary presiding minister of the funeral liturgy. Except for Mass, a deacon may conduct the funerla liturgy. If pastoral need requires, the conference of bishops, with the permission of the Apostolic See, may decide that laypersons also preside at the funeral liturgy outside Mass.
I’m not aware of any situation in the US where lay people may preside at funerals. Perhaps my friends from other places are aware.
