Just to add on what everyone is saying the way you currently have your pond edged, is going to create problems down the road. All are quick easy fixes as mentioned.
1-leaving exposed liner just doesn’t look good or natural, easily fixed by digging a ledge at the top edge of the pond perimeter going down about a foot, which will leave you plenty of room for fluctuations in water level without ever seeing the liner.
2- Even if the ground is sloped away around your pond, you have the liner laying flat under the rocks, I can see dirt between the rocks, that is all going to end up in the pond on a rain, pull the liner up behind the last rock at the top edge and fold it so no dirt can get into the pond. This especially important up around the waterfall side of the pond, where the slope is headed towards the pond, even flat areas with hardly any incline can still have dirt wash into the pond, if there isn’t a bit of a berm around it.