In health, there are some thing objectively “better” but most are trade offs.
If you lift in the morning on a fasted stomach you will burn more fat. However your glycogen stores are likely depleted and you will not be as strong as lifted towards the end of the day when your muscles are fueled.
Are you looking to burn calories or get stronger? It’s not quite so black and white but you get the idea.
Most of “health” is based around a bunch of fairly similar practices that deviate dependent on your personal goals.
It’ll be much harder to make strength gains with long intermittent fasts. Not impossible. And fasting is super great. It’s just a trade off.
Over 15 years I promise you I’ve learned that everyone has the “objective” path to the elite health but really it’s just dependent on what you’re looking to achieve.