Another possibility is that the Disney+ Loki show has mashed up several characters from the comics into a brand new character.
This document certifies that these horned helmets were inspired by the elements worn by Loki and Sylvie in the Marvel series: Loki.Take on the role of the God of Mischief with the Sylvie and Loki helmet replica set.While Sylvie Lushton, in the comics, is given her powers by Loki to become a latter-day Enchantress, it’s possible that Di Martino’s Sylvie was originally a Loki variant who, for reasons unknown, has taken on a distinctly different identity.Yet another option is that this Sylvie is the direct magical creation of a Loki (as in the comics) or is their child or sister.
Being a Loki creation or relative could also explain why Sylvie has a Loki-like “temporal aura” that tricked the TVA into thinking she was a Loki variant.