hive isn’t seeing your card. If it isn’t a hardware issue (riser, cables, power, etc.), could be a bios problem. You could try running it without any overclocks, and cycling the power
Try nvidia-info to see if it detects your card.
=== GPU 6, 10:00.0 GeForce RTX 3060 Ti 7982 MB ===
Bios 94.04.46.00.D2, PCIE Link Gen 1, PCIE Link Width 1x
UUID GPU-1429493b-1682-aa85-ec1a-0687df02b12c, ROM flash: Supported
Power Limit: Min 100.0 W, Default 200.0 W, Max 200.0 W, Current 200.0 W
Frequency: GFXCore 1290 MHz, MEMCore 7400 MHz
Memory: Total 7982 MB, Used 5129 MB, Free 2852 MB, Hynix GDDR6
Utilization: GPU 100 %, MEM 100 %, Throttle: None
PSTATE P2, PWR 148.8 W, Temp 57 °C, Fan 36 %, RPM 1931 (35 %), RPM 1820 (35 %)
Else, you could use lspci. Your card should be listed somehow in the output
10:00.0 VGA compatible controller: NVIDIA GA104 [GeForce RTX 3060 Ti LHR] (rev a1)
10:00.1 Audio device: NVIDIA GA104 High Definition Audio Controller (rev a1)