Perhaps this SEP article will be of some help: Reductionism in Biology

Epistemic reduction is the idea that the knowledge about one scientific domain (typically about higher level processes) can be reduced to another body of scientific knowledge (typically concerning a lower or more fundamental level). — Reductionism in Biology

Well, we have Mendel's laws of inheritance which is a bona fide biological law. I would put my money on the existence of biological laws rather than the contrary.

I'd say it's not so much that there aren't, simply they are different across the animal kingdom and can be easily circumvented or made irrelevant.

Humans and just about anything else has to eat or drink to sustain themselves. This is not true for certain single-celled organisms like tardigrades. Also, the 'immortal jellyfish' is quite the conversation starter.

Maybe tomorrow some wacky scientist will come up with a way to make us live forever or be able to offer some surgery where we only have to eat every year or so. If Goliath fought David by hand the story probably would've turned out a bit differently. Not a deviation from Darwinism simply that it is safe to assume 'survival of the fittest' is not explicitly about physical size or prowess. On that note evolution would seem to suggest these laws are dynamic anyhow.

When you say 'biological laws' do you mean say the scientific processes ie. cellular respiration or more of behavior and whatnot or everything in between?