522 error when trying to redirect Apex to www domain

I've previously followed these instructions (but inverted the redirect rule to be the other way around): https://developers.cloudflare.com/pages/how-to/www-redirect/

This used to work for me before, but now it stopped working after I split my site into two Cloudflare accounts:
1- personal account: contains domain registration and DNS
2- work account: contains Pages and Bulk Redirect rule

I've attached photo of my DNS settings. I'm guessing the issue is that the AAAA record needs to point at the 2nd account so that its Bulk Redirect rules apply, but I'm not sure what value to put there instead of 100::.

Can you help me please?
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