All four services will allow you to consult with a military lawyer in regards to appealing LORs, GOMORs, and Adverse counselings. The problem is that the paradigm that the military lawyers are using to respond to these actions is out of date. The templates they use tend to have the Service-member “falling on their sword” and accepting responsibility. The idea is that if there is an acceptance of responsibility their will be mercy from the commander.
This is an old way of thinking and does not work. In the current era of “no defect,” service, the best way to handle LORs, etc is to fight them. You should not admit to any wrong doing, but instead defend your case at every level, to include the lowest level.