jchrisabella wrote:
I recently updated my MacBook Air early 2014 to macOS Big Sur, but I was unable to find the optimized battery charging option in the battery pane. Is there any way to fix this?
There is no fixing it, it is not available to you...
Battery Health Management...
About battery health management in Mac notebooks https://support.apple.com/en-us/HT211094
—this feature is limited to Mac laptops with Thunderbolt 3 ports. That equates to all MacBook Pro models released since late 2016 and the Retina-capable MacBook Air models released since 2018.
You can review—
Batteries - Maximizing Performance - Apple
https://www.apple.com/batteries/maximizing-performance/
Determine battery cycle count for Mac notebooks
https://support.apple.com/en-us/HT201585