The recovery article suggests turning off and not use any device with the same Apple ID to avoid delays. However, that's not always possible. What I have found thru family and clients is it can still work if you avoid using your Apple ID in any way.
- Turn off and don't use any devices you possibly can or limit your use on these devices as much as possible.
- Turn off auto updates for apps on every device you have, Mac, iPad, iPhone, Watch, etc. Basically, don't do any or allow updates of apps or software while still in account recovery.
- Turn off FaceTime and iMessages, only use your phone number SMS.
- Don't try to sign into the Apple ID at all.
Pretty much do not do anything that might use or try to use your Apple ID because if it is successful the system might think you don't need account recovery anymore and auto cancel it.