DNA “information” is in regulation of gene expression and what useful protein that gene codes for.
That “information” is subject to change, change is in fact inevitable.
You can talk about “loss” or “gain” of information all you want.
Does a car engine that can burn unleaded fuel instead of leaded “lose” or “gain” information?
Does a car with greater speed and performance but less mileage “loss” or “gain” information?
If a gorilla developed a more upright posture, would that be a “loss” or “gain” of information?
RE: That “information” is subject to change, change is in fact inevitable.
Yes, but is it DARWINIAN EVOLUTION ? I change and in fact am changing -— from better to worse as my health deteriorates. That is hardly Darwinian Evolution. I call it devolution ( for want of a better word ).