MN1 advise needed

All our Visas: SWV, SKW dependent expire on 15th Oct 2026, we are eligible to apply for ILR on12th October, our son who is born in UK, his visa will expire on 15th October as well. But we plan to apply for his MN1, is it fine while we wait for our ILR and his visa expires and then we apply for his MN1 ?