Google Merchant Center Optimization for Shopify Store

I've got a Shopify store linked to Google Merchant Center, but I'm facing several issues. Some of my products are being disapproved, I'm noticing low click-through rates and limited discoverability for others. I need an expert in Google Merchant Center to take a thorough look and help me resolve these issues.

Key Responsibilities:
- Diagnose and fix product disapprovals
- Enhance click-through rates
- Improve product discoverability

Particulars:
- The main suspect for product disapprovals could be policy violations, specifically related to lions mane and helping peoples wellbeing.
- I would appreciate assistance in reviewing my product data and ensuring compliance with Google's policies to correct disapprovals.

Ideal Skills and Experience:
- Proven experience with Google Merchant Center
- Deep understanding of Google’s policies
- Experience troubleshooting Shopify on page content and Google integrations that could cause these issues
- Ability to improve product visibility in Google