Yes you can eat freezer burn ice cream.
The freezer burn on the ice cream does not harm the ice cream or make the ice cream unsafe to eat.
All the freezer burn will do to the ice cream is make it less appetizing and it won't be as good tasting to most people.
But it's still okay to eat the freezer burn ice cream if you want too.
I've eaten freezer burn ice cream before and never gotten sick from it.
You can also eat freezer burned meat as well as the freezer burn on the meat does not affect the safety of the meat.
It just makes it less good tasting.