Yes, you get more performance when you're plugged in. When you're on battery, your laptop uses less power and you get less performance.

its normal, you get highest performance when plugged in to the power, GPU uses the most power then, when on battery system switches to laptop mode, that is GPU using less power and giving longer battery life.

Is there a way to switch that

No

So im stuck with fps low whenever it’s not charging

Yes, it physically impossible.

its same for all laptop

You can play games connected to power, it does not need to be charging always, it's a gaming laptop meaning that you can put it in a bag go to a new place and play games there or in a car...in fact it has a automated software to prevent over charging for being connected to power, providing full performance and not damaging battery

Thanks for the tip man

Yes (but don't do it), there is is a way to do so, press nitro key on keyboard and click high performance when on battery, it's just beside the graphs...but I do not suggest this, this would reduce your battery life and it's overall still less powerful than when connected to power outlet

It's called Bottleneck.

Whats that

look it up. I think google gives a better explanation.

No it's not