Some females who have transitioned or are transitioning to males may choose to bind their chests. Since this impacts the breathing mechanism, all individuals who make this choice should be careful in how they do it. Here are a few articles to help with this process.
Binding 101 – Tips to Bind Your Chest Safely. This article appears on the Point 5cc website – an online clothing store that sells trans-inspired clothing. Despite the commercial nature of the site, the article gives sound advice. In addition to this article, they have another entitled Binding Safely for Your Body: Tips for All Body Types and Sizes.
Chest-binding may require some singers to retrain their breathing, as the movement of the chest will be somewhat constricted. This site will be updated to include articles about breathing that may be helpful.