For those who are using an NVIDIA GPU and having some trouble displaying the temp. [aside from using NVTOP or other terminal-related solutions], you can use a widget called Thermal Monitor temporarily
Nvidia GDDR6X Memory Temperature Monitoring with TechPowerUp GPU-Z 2.37.0 | by Bloodys | The Crypto Blog | Medium
How To Check and Monitor GPU Temperature
How to Check Your GPU Temperature [Quick Methods]
How to Check Your GPU Temperature [Quick Methods]
Windows 10 Help Forums
GPU HotSpot Temperature Monitoring for Nvidia GPUs With HWiNFO v6.43–4380 Beta | by Bloodys | The Crypto Blog | Medium
How to see the Video Card Temperature (Nvidia, ATI, Intel...) - Ask Ubuntu