empty `input` object when using mutation

const devCompanyMutation = trpc.devCompany.create.useMutation();

  const onSubmit = (latestDoc: T_Insert_DevCompany) => {
    console.log({latestDoc});
    devCompanyMutation.mutate(latestDoc);
  };

export const devCompanyRouter = router({
  create: publicProcedure
    .input(z.object({
      name: z.string().nullish()
    }).nullish())
    .mutation(({ input }) => {
      console.log({input})
      return input;
    })
})