OP as it's a fresh build and mobo in supply chain could have older firmware I'd aim to update those. Some of the older UEFIs did not shown correct temp info for me. Also do the OLED FW update linked at top of
this thread. As without the OLED FW update you could be seeing incorrect temps on that.
Also please post a screenshot of
HWINFO sensors page, need to see tctl and tdie.