want to buy a fpga that can show its real-time power consumption

Hello,

There is real-time voltage monitoring feature using Quartus configuration debugger tool. All devices with SDM(Secure Device Manager) such as Stratix 10 and all Agilex series have this feature.

link : https://www.intel.com/content/www/us/en/docs/programmable/691274/current/reading-voltage-measurement.html

regards

Farabi