She does seem impossibly elegant and mature. She looks her age but seems older (in a good way) because of this. She could command the attention of a room without her astonishing figure. She might be one of those people whose attractiveness is so specific that it makes them hard to cast- like how Jon Hamm couldn't get roles in his 20s because he could not pass for a teenager like most of his peers could.
The success of WandaVision led to a "Bewitched" movie entering development. What if an "I Dream of Jeannie" movie came next and cast a certain actress who would be more regionally accurate for a Genie? Honestly, it would play to her strengths- make her funny, but she's still obviously an immortal being that a mortal is out of his depth dealing with. And make Jeannie falling in love with Major Nelson a slow reveal- show that they're both fundamentally good by having her not interfere with his relationship with his fiancee and Major Nelson being able to resist Anveshi freaking Jain only until it is clear his fiancee is not the woman for him.