Google change of address tool from .co.uk to .com resulted in huge derank

December 2020 I moved a site from a .co.uk to a .com. No other changes, simple 301 redirect and use of the tool in google webmaster tools. The site had existed since 2006 and was the de facto site in the vertical, meaning I had plenty of P1s on google for medium tail keywords.

Now, 2.5 months later I am still hugely deranked for 10,000s of key words, and as a result I’ve dropped 40% of my traffic.

I was wondering whether anyone had any advice. Obviously this is a huge issue for me as it’s my livelihood I’ve built up over 15 years of hard work. I followed googles direction perfectly (my background is actually web dev and SEO) and it’s still deranked me.

I’m not sure the linking policy here, but the site is tyrereviews dot com, it used to be tyrereviews dot couk, and for example we used to rank 1 or 2 for the search "michelin primacy 4" in google UK however we are now page 2.

The new .com domain is targeted properly to the UK in webmaster tools too.

This is the same for many many medium tail keywords.