Terminal Web seems to be buggy right now.
For a node to be a good routing node, capacity isn’t the only metric too look at. Availability is also a key parameter, but Umbrel node is doing great in this regard.
I think what deteriorates Umbrel node’s score as a routing node is too much, too small channels with nodes ran by “normal people” just like you and me.
The channels are too small and unbalanced. So even if in theory they can route payments, in practice they’re a bad route that fail often.