Fix WooCommerce Multivariation Listings Issue

I'm seeking an experienced WordPress developer to help resolve an issue with my website's multivariation listings. After restoring my site from an old backup due to a server hack, some combinations for multivariation listings are no longer showing as available. The site is built on WordPress and uses WooCommerce for managing product variations. The issue affects physical products, and I need it fixed to restore full functionality.

Key Requirements:
- Diagnose and resolve the issue with WooCommerce multivariation listings
- Ensure all product variations are correctly displayed and available
- Verify the integrity of the restored backup and make necessary adjustments
- Maintain the security and stability of the website during the process

Ideal Skills and Experience:
- Strong expertise in WordPress and WooCommerce
- Experience in troubleshooting and resolving plugin-related issues
- Familiarity with restoring and managing website backups
- Knowledge of WordPress security best practices
- Excellent problem-solving skills and attention to detail

If you have the skills to fix this issue and ensure my website runs smoothly, please reach out with your proposal.