GPUs were on their way to more efficient power use until around 2019 when the new generations went completely the opposite direction -- which has been terrible for laptops with higher-end graphics chipsets. If you want graphics performance, battery life is terrible and quickly requires running off mains power. The onboard graphics chipsets from Intel and AMD can sip power and grant fantastic battery life, but are only marginal for 3D graphics applications. It's not just an issue for gaming; high-end laptops for engineering/technical use also come with the corresponding GPU chipsets for that usage sector. The current generations are every bit as power-hungry as gaming laptops.
We seem to be turning back the clock to a decade or so earlier when performance gains were coming at the cost of worse and worse power consumption plus more heat output -- a sure sign of inefficiencies that need to be worked out. That's where ARM-based designs like Apple's M-series system-on-chips which include the graphics processor are really getting interesting. Hopefully the rest of the industry will learn something from it and figure out ways to get power consumption and waste heat back under control for systems that need to do more than just run productivity software/surf the web/play multimedia.