Ios Background Ble Advertising Not Detectable By Android

When an iOS BLE peripheral enters the background state, the advertising packets are not emitted in the regular manner and they are placed in a special “overflow” area which is

Solution 1:

With "overflow" area I guess they mean Scan Response Data. To get that data, a device must perform an active scan, rather than a passive scan. In an active scan, the scanner sends a scan request packet immediately after it detects an advertisement packet. The advertising device will only broadcast the scan response data if it detected a scan request.

Android devices only perform active scans, so you should be fine.

EDIT: the answer above is not correct. See http://www.davidgyoungtech.com/2020/05/07/hacking-the-overflow-area for correct information.