Specifically the Qualcomm USB Driver for Qualcomm models or MediaTek (MTK) USB Drivers for MTK variants.
For MediaTek-based models like the PD1818CF, follow these steps to manually format the FRP partition: vivo y91 frp unlock file download
Get the Vivo Y91 FRP Unlock File and SP Flash Tool. Specifically the Qualcomm USB Driver for Qualcomm models