I believe that once it says the phone will be removed, it isn't the OP's decision – not any more. The only way one would see that message would be if they had already made and carried out the decision that the criminals wanted.
The criminals will have a full month to take advantage of the absence of Activation Lock before Activation Lock could possibly kick back in. My impression from other posts on these forums is that, during that month, the phone is visible on Find My – but that there is no way to reverse the clearing of Activation Lock or the delayed removal from Find My.
Remove a device from Find Devices on iCloud.com - Apple Support
"If the device is offline, Activation Lock is removed immediately, and the device is removed from Find My after 30 days.
Note: If your device comes online after 30 days have passed, it reappears in your list of devices, and Activation Lock is reenabled if you’re still signed in to your Apple Account on the device (for an iPhone, iPad, Mac, or Apple Watch) or if it’s paired with your iPhone or iPad (for AirPods or a Beats product)."