Here is a link of the same question on Apple support link, they directed me here to get help.
Long story short, there is a lot of intel binaries on my M1 Mac due to transitioning from Intel Mac. What's the best way to replace them all with universal or M1 binaries with homebrew? Manually reinstalling everything seems tedious.
I am surprised that during Time Machine porting session it didn't automatically download M1 versions tbh.