react-query/docs/framework/angular/guides/parallel-queries.md

export class AppComponent {
  // The following queries will execute in parallel
  usersQuery = injectQuery(() => ({ queryKey: ['users'], queryFn: fetchUsers }))
  teamsQuery = injectQuery(() => ({ queryKey: ['teams'], queryFn: fetchTeams }))
  projectsQuery = injectQuery(() => ({
    queryKey: ['projects'],
    queryFn: fetchProjects,
  }))
}

TanStack Query provides injectQueries, which you can use to dynamically execute as many queries in parallel as you'd like.

export class AppComponent {
  users = signal<Array<User>>([])

  // Please note injectQueries is under development and this code does not work yet
  userQueries = injectQueries(() => ({
    queries: users().map((user) => {
      return {
        queryKey: ['user', user.id],
        queryFn: () => fetchUserById(user.id),
      }
    }),
  }))
}