Does anyone recommend this piano?
There are some people on the forum who do. And some others might not.
How long is the life span of the piano since it’s digital?
It's anything between the warranty period and several decades. You never know what breaks and when. And mechanical bits will wear out to some extent.
Also, the pedal comes separate? Do you need the pedal for it to sound better?
A single pedal is included, but it's just a small plastic box and not shaped like a piano pedal. It's possible to replace that with a nicer one. The triple pedal set LP-7A is sold separately.
The sustain pedal is pretty much a must at some point. The others are not that critical.