flue extension

Hello, I hope everyone is well. I am hoping someone can help me, I have spent many hours researching. Im due to have a lean to catio built (cat-patio), very much like a carport. The boiler flue is on the wall where the catio will be built. What options would you recommend? Eg: Is there a way...

When I had my boiler serviced I was told it failed as the flue outlet is too close to my conservatory. Is it easy enough to get a flue extension attached to the wall, and then out away from the guttering/roof? - gutter sticks out from wall about 20 cms. The outlet is about 40+ cms from the...