Hello Jamie.

Thank you for your question.

The images appear to be beech blight aphids which can promote further damage in the form of fungal infections.

Below is a link that details this type of infestation (and more).

https://www.canr.msu.edu/news/is_it_beech_bark_disease

Some of the methods for treating this condition include physically removing scale insects, applying horticultural oils or insecticides.

This links contains additional in-depth information on both diagnosing and treatment.

https://www.canr.msu.edu/uploads/files/e2746.pdf

Question – Have you actually seen insects on this tree?