It says it takes up to 24 hours but I’ve been stuck on this message for well over that:
Confirming pointing
However, dns propagation suggests that the domain pointing is now complete and it 's correctly pointing to the new A record, so not sure why my account is stuck on this message.
Can you DM or post the domain name you’re having issues with pointing?
Best regards,
Zach
This seems to have since resolved itself. For some reason within the control panel/login area it was only asking me to update the A record, but not the CNAME record. At some point later ( a few days or so) that information then changed to only tell me to set the CNAME record. So I may have missed that. Either way I think the information should display all the required DNS record changes from the outset to avoid any confusion.
Hi there @anotheruseraccount 
Thank you for your reply and update! 
In general when adding custom domain, once the TXT verification process has been completed, it would ask either, to point via CNAME record for domain that’s already connected to CloudFlare (e.g.: through your own active Cloudflare account)
or
to point via A record for domain that has no connection to Cloudflare (proxy or DNS)
Anyway, I’m glad to see it’s now resolved! 
Best regards,
Agus