Joseph, record firearms sales generate record ammunition sales and high demand generates low supply. You can find .380 ammunition at https://ammoseek.com/ammo/380-auto

Supply just still hasn't caught up with the demand that covid and the election brought, most manufacturers focused primarily on producing 9mm and 223/556 ammo as these are the. Top selling calibers. With Vista group recently putting Remington ammo back to 24hours a day production it should be getting better.
In the meantime in stock here
ammobuy.com/ammo/380-auto