Hi. I have two small plastic pipes protruding from under the roof are leaking a lot . Not sure why. I also had recently power flashed the kitchen pipe - could there be a connection? Please help

I am sure we can help once you tell us what "power flashed the kitchen pipe " is, never heard of it. How large are the pipes and is this in the aera of your roof line considered to be the eave or soffit?

This is obviously my technical term :-) for cleaning the blockage with jet pressure. The white pipes are thin (about 2-3 cm) - no idea what the roof line is

Power flushing your kitchen drainage has nothing to do with those pipes. Tell me more about them.
I have two small plastic pipes protruding from under the roof Do these pipes go through the roof to the outside? And both pipes are between 3/4 and1"? Can you tell me what theses pipes connect to or their function? At first I thought these were vent pipes but they're too small. Can you furnish more details? Back to you, Tom