2 Months old MacBook Pro (Mid 2020) battery only last for 4 hours
You’re using Chrome. That is a known energy hog on macOS. You can observe this yourself by keeping Activity Monitor (/Applications/Utilities) open to the Energy tab while you’re working.
Long battery life on modern computing platforms is the result of massive, massive amounts of engineering across all levels of the software stack. It requires adopting certain APIs and adhering to certain behaviors &amp; best practices, and so it only works when all your software is well-written and well-behaved. Apple tries to make it straightforward for developers to adopt energy-saving practices, but that doesn’t mean that all software will. In particular, large and cross-platform apps (such as Chrome) will deviate from recommended design patterns for one reason or another, and this often causes all sorts of issues with energy usage (not to mention stability, performance, security, and privacy).
Short story: Switch to Safari. Try it for a week. See if your battery life doesn’t double.