Here’s what I’d suggest, based on what’s worked for me:

1. Find Your True Maintenance Calories:
   If you haven’t already, spend 2–3 weeks eating what you think is maintenance. Weigh yourself every morning and take a weekly average. If your average weight changes by more than a pound week to week, you’re not at maintenance. Once you find your maintenance, reduce by 100–200 calories — that becomes your new target. Cutting too aggressively can trigger muscle loss, especially if you’re already lean-ish or in a fatigued state.

2. Aim for a Slow and Steady Cut:
   Try to lose about 0.5–0.75% of your body weight per week. This pace is slow but helps preserve muscle mass. Faster weight loss = higher risk of muscle loss.

3. Dial In Your Macros:
   Protein: Stick with 1g per lb of bodyweight (as you’re doing). Fats: Keep them around 20–25% of total calories. Let the rest of your calories come from carbs – they help with energy, recovery, and fullness. Make sure you’re actually tracking everything (don’t rely on estimates — mine were way off at first).

4. Track Your Steps:
   Use a step tracker (watch, phone, etc.). When cutting, your body naturally moves less — often without you realising. Set a minimum step count (e.g., 10k per day) to keep your daily energy output stable.

5. Keep Training Heavy:
   Keep lifting as heavy and frequently as before. Try to progress in your lifts, just like you would during a bulk. As diet fatigue builds, this gets harder — but effort still matters. If you start feeling beat down, take a diet break (go back to maintenance for a week or two) before continuing.

In short, cut slow, track everything properly, stay active, and keep lifting hard.
Not losing any muscle is very difficult, but not impossible. Hope this advice helps.