Graph of hyperbola appears empty in Desmos: $\left|\left((x+c)^2+y^2\right)^{1/2}-\left((x-c)^2+y^2\right)^{1/2}\right|=2c$

Question

I tried to graph a horizontal hyperbola whose $d$ is $2c$. I tried with different graphing tools online and they are all empty? Why?

If $d=2c$, then we know every point on the $y$-axis such that $x\geq \pm c$ is part of the hyperbola. But why is this not shown on any tool that I used? I tried $y=0$ and that is shown.