Answer:
have been facing
Step-by-step explanation:
Here, the usage of "would " in the sentence indicates that it's in present tense. As the body of the sentence is framed formally, we get to know that this can be a sentence in formal letters or notice.
Through the sentence we get that the writer is requesting to notice something that is happening continuously so the word should be in present continuous form so we should use " have been + ing form " there.
Through the sentence structure we will get to know that the thing had and is still happening over the place, so the " facing " will be the appropriate word.
So the answer is " have been facing "