Take a look at the protocol for the protein sparring modified fast which is a form of short to medium term fast that is designed to retain muscle mass by eating tons of protein with a large caloric deficit (1k+ calories a day). You can easily convert it to a more sustainable Ozempic diet by adding more fat/carbs to make the lean protein more palatable.

Fair warning though, this isn't an easy diet if you're not good at cooking and can't easily develop your own recipes. Lots of lean chicken breast so techniques like sous vide really help.

Prefer not -- sorry! I'm here on my real name. If you want my advice, lose the weight then worry about it. A good amount of research indicates you tend to gain muscle mass in the fat/muscle percentage you start with; regardless if you are seriously in need of weight loss, the benefits of doing that far outweigh the (temporary?) downsides of losing some muscle mass for most people I bet.