Hello @Doug McCrea
Thanks for reaching out to us!
Yes, it can take up to 24 hours. As the result I just checked, you can use East US 2 as an option (you should be approved in this region).
It will not work for East US (that is reserved for approvals before early-summer ban and will not be available for new approvals to avoid capacity issue).
I hope this helps.
Regards,
Yutong
-Please kindly accept the answer and vote 'Yes' if you feel helpful to support the community, thanks a lot.