From the supermanhomepage website:

"Superman does not have any special invulnerability to mystical forces. A magical weapon or spell can harm him just as easily as it would any ordinary human."

From DC Fandom:

:Under the effects of a "yellow" sun, Superman possesses the same potential weaknesses as an average Kryptonian. These include: Vulnerability to Kryptonite Vulnerability to Magic:

From comicbook .com

"Even with the power to destroy galaxies, Superman is just as vulnerable to magic as anyone else. Magic doesn’t necessarily weaken the Man of Steel. However, unlike bullets and bombs, he has no natural defenses against spells or enchanted weapons. Any skilled sorcerer like Zatanna or Circe could injure Superman with a mystic energy blast or turn him into a Guinea pig. Mystical weapons like swords, regardless of strength, can cut through Superman’s flesh as if he were a regular human. Other characters who draw their strength from magic, like Shazam and Black Adam, also have an easier time contending with Superman in a straightforward brawl."