Are you referring to the USB dongle? If Resolve is missing that, then you have likely downloaded the wrong installer. Make sure to download the "Davinci Resolve" (no "Studio") version!
Resolve Studio 18.1.3 | Windows 10 Pro (21H2) Intel i9-10980XE | RTX 3090 (528.49 SD) | 64 GB RAM | Mini Monitor 4K (12.4.2) | Mini Panel