It looks like you're well on your way to being stage-ready, but with 8 weeks left and at 1800 calories, it seems your coach is focusing on the visual aspects as well.
If you have a coach you've been working with for a while, it's important to trust their expertise and follow their guidance closely. Being on autopilot and sticking to their instructions will help you stay on track.
While I haven’t personally done a competition prep, I’ve observed that we currently have 8 individuals preparing for competitions in my coaching team, and each of them is on a unique plan tailored to their needs. Some are coming into prep weeks this week, and their approaches include water cutting, carb loading, and certain supplements.
It’s possible you might see a gain of 8kg in peak week or go through a carb-loading phase, and there might be a need for additional supplements. That’s all part of the process that your coach is handling. The best approach is to embrace the journey and trust in the plan they’ve laid out for you.