type UserStruct = {
  'prefix:name': string
  'prefix:age': number
  lastName: string
}

type RemovePrefix<T> = T extends `prefix:${infer U}` ? U : T

type RemovePrefixFromStruct<T> = {
  [K in keyof T as RemovePrefix<K>]: T[K]
}

const user = {
  name: 'John',
  age: 25,
  lastName: 'Doe'
} satisfies RemovePrefixFromStruct<UserStruct>