A chick can live three days or more without any food or water. It gets what it needs for that time by absorbing the yolk. That's why they can be shipped in the mail and the Mama hen can stay on the nest until the later eggs hatch.
Any time you open any incubator you take a chance in shrink-wrapping a chick that has pipped but not completed hatching. That is where the membrane inside the egg shell dries out and shrinks around the chick, restricting its movements to where it cannot move to complete hatching. This is not something that will happen every time you open the incubator but it can happen. There are a lot of different factors involved in twhat the odds are of it happening if you do open the incubator. Some incubators are more at risk than others, but there have been people with the larger cabinert type incubators that have reported this problem. The basic issue is reducing the humidity in the incubator.
Like most things involved with chickens, the answers are usually more complex than some people seem to be able to understand. The recommendations on this forum, such as the recommendation to not open your incubator during lockdown, are generally designed to improve your odds of not having problems, not guaranteeing that you will or will not have problems. Many of us violate some of the recommendations and seldom have problems, but most of the recommendations are here because some people have experienced problems. I've opened the incubator a few times and not caused problems, but I have also shrink-wrapped chicks before by doing that. Sometimes you have to deal with a problem and face the potential consequences.
With all that said, I suggest you not open the incubator during lockdown, regardless of the type of incubator you have, unless you have a real need to open it. Not that I guarantee you that you will have problems if you do, but that you may have problems. And with a normal hatch, there is usually no need.
Good luck!!!