He's lost an incredible amount of weight in a short time. A metabolic response
driving a weight-loss plateau is inevitable. Hopefully, the extraordinary progress he has already achieved buoys him through that lull. It's a great time to get stronger. Just as the plateau is inevitable, so is the resumption in the body's response to nutrition-rich calorie deficits and great exercise and training.
Thanks for sharing the story. We're cheering for him, even if only anonymously.