If you look at the ExtendedBeaconScanner sample that is included for Delphi in 10.1 Berlin, you will learn how to scan for Beacon devices using different scan modes: Standard, Alternative, Eddystone, and Extended. When selecting the Extended mode, the sample allows you to select the kind of Beacon device to scan: iBeacon, AltBeacon, and Eddystone. The Extended mode allows scanning all different kind of beacon devices simultaneously. This sample shows how to use the Extended scan mode to discover all kind of beacons at the same time. The demo also works with the Standard, Alternative, and Eddystone modes to discover registered beacons.
You can find the ExtendedBeaconScanner sample project at: C:\Users\Public\Documents\Embarcadero\Studio\18.0\Samples\Object Pascal\Multi-Device Samples\Device Sensors and Services\Bluetooth\Beacons\ExtendedBeaconScanner
You can also find the sample in the Sourceforge Subversion repository for Delphi at: http://sourceforge.net/p/radstudiodemos/code/HEAD/tree/branches/RADStudio_Berlin/Object%20Pascal/Multi-Device%20Samples/Device%20Sensors%20and%20Services/Bluetooth/Beacons/ExtendedBeaconScanner