Motorola uses a mix of MediaTek and Qualcomm processors. The Qualcomm variants are significant because they utilize the EDL Mode (Emergency Download Mode) . This mode allows the device to interface with a PC at a low level, enabling the flashing of firmware or, in the case of these unlockers, the patching of partitions to bypass the FRP lock.
The FRP Unlocker tool typically works by exploiting vulnerabilities in the device's software or by using advanced algorithms to bypass the FRP lock. In the case of Motorola devices with Qualcomm CPUs, the tool may utilize the Qualcomm CPU's built-in features, such as the Emergency Download Mode (EDM), to access the device's system and bypass FRP.
Take the phone to a local repair shop. They have the legal boxes and will unlock it for $10–$20—cheaper than a new motherboard if you brick it.