I was able to identify the problem causing my phoneās battery to drain after doing some tests. In essence, the āadaptive batteryā option does not function as intended. Now that I disabled it, everything is returning to normal. Furthermore, the 60 to 100 approach is also providing me with far greater result; itās like the cherry on top.
Result: My phone was last charged 12 hrs back and I still have 30% battery with 3 hrs of screen time.
Nothing Team needs to take a look at the Adaptive Battery feature and fix it.