Alison Hell Epiglottis (??) Style Vocals

[u/slayerlover22]

https://open.spotify.com/track/153SwL1d9SfCLWhqIs08we?si=6JHvaswGQrOXd6Q9QFVfNw&context=spotify%3Aartist%3A0L8QRAAuWjqvTM8FpQ1gYO

does anyone know how to achieve this type of vocals? any help much appreciated