Resolve Website Indexing Issues

I'm seeking expert assistance to resolve a persistent issue with my news portal website. Currently, only the homepage is being crawled and indexed by Google, while none of the internal pages, such as articles or categories, are appearing in search results.

Here's what I've done so far:
- Submitted the website through Google Search Console
- Submitted a valid sitemap.xml and robots.txt
- Tried using the Google Indexing API for eligible content
- Ensured that the content is original and structured properly

Despite these efforts, the problem persists. I have checked Google Search Console and found crawl errors, but I need help identifying and addressing the root cause to ensure all important pages are indexed properly by Google.

Key Requirements:
- Analyze and resolve crawl errors reported in Google Search Console
- Identify any underlying issues preventing page indexing
- Ensure that all article and category pages are crawled and indexed
- Provide guidance on best practices for maintaining proper indexing

Ideal Skills and Experience:
- Expertise in SEO and website indexing
- Experience with Google Search Console and resolving crawl errors
- Knowledge of sitemap and robots.txt optimization
- Strong problem-solving skills and attention to detail

Your expertise in diagnosing and fixing these issues will be invaluable in improving the visibility of my website's content.