How is this relevant for you ?
If you use a battery for a Arduino board with WiFi, then there are better solutions.
If you mention a "Low Power" that gets installed, then you have to mention which one, there are so many. There are a number of "LowPower" and "Low Power" libraries.
I think that you mention this one:
If you click on "More info", and then on "Go to repository", then look at how many stars it has and then see if the "Issues" are fixed.
It has 72 stars (good), but also 20 bugs (not good), and if you read this, then the library is only for one nRF52 board, the Primo board.
Arduino is open source. Some bugs takes years to fix. Everyone can write a library (good or bad).
The best way for an Arduino project is to tell us what your project is for (give a broad view of your project). Use common hardware and common software that everyone uses and stay away from boards that have two processors (double the trouble for the price of one).