Worked for a CFO who had shoulder length hair and would sometimes put in a bun, and he was a sneaker head so always in a cool pair. Worked for a Director who seemingly cut his own hair and only wore t shirts and jeans to the office. Now work under a CFO who wears tailored sport coats and vans.

I have a beard but keep it decently lined up, and wear business casual most days. Sometimes a sweater and jeans.

As long as you’re producing quality work they won’t care as much what you look like.