I'm likely biased in that I've run a nearly 100% remote team for almost a decade. I don't find it difficult (most of the time; some days trying to manage multiple geos when multiple escalations are in play can be trying, but having excellent, competent staff helps) but I do think it requires mindset and approach that is different from folks who operate from a "I need to see them in a desk" mentality.

It starts from hiring people that inspire trust, and then...trusting them. Get them their assignments, mentor/coach them when and where needed, but otherwise let them do the work. Let them shine on their own.

Metrics are largely measurable anywhere, if you picked the right ones.

Build esprit d'corps. The rest starts to fall into place naturally after...