SEO migrations are honestly one of the riskiest things to get wrong - and the fact it's been 8 months with no authority transfer means something fundamental broke along the way. 😬
Here's what I've seen work when a move like this goes sideways:
🔸 Check your redirects first - every single old URL needs a 301, not a 302, and they should point to the most relevant new page, not just the homepage. A colleague once found 40% of their redirects were 302s by accident.
🔸 Verify the new domain isn't blocked - look in Search Console for manual actions, and make sure the property is verified. Sometimes the new domain inherits old penalties or gets flagged for a sudden change.
🔸 Re-request indexing - if authority isn't flowing, Google may still see the old domain as the canonical version. Use the URL Inspection tool to force recrawl of your most important pages.
🔸 Check backlink health - run a fresh backlink report. If the old domain still shows links but the new one doesn't, the redirect chain is broken somewhere. Tools like Ahrefs or Majestic will spot that fast.
🔸 Don't forget internal linking - update all internal links to point to the new domain. A site with broken internal links looks like a ghost town to crawlers.
I've been through two big domain moves myself. The one that worked took about 10-12 weeks to recover full ranking. The one that failed (agency handled it) took over a year to fix because they skipped the 301 map. If you're eight months in, I'd hire an SEO consultant to audit the redirect chain and the server response headers. Sometimes it's a tiny config issue, like a missing trailing slash or a www vs non-www mismatch, that kills the whole transfer.