This is a great point and could be modelled providing that you have access to prospective mortality tables. I fear they are not easily available for most countr

This is a great point and could be modelled providing that you have access to prospective mortality tables. I fear they are not easily available for most countries and some might be guarded by actuarial societies. For a bias that might balance things out: measuring covid by excess mortality also fails to account for less deaths by traffic and other infectious diseases. I've never come across mortality tables that are broken down to causes of death.