Ah indeed, details are missing for mine (in The Netherlands) too, though those happen to still include their coordinates.
Also, they show "last_seen": "2020-10-09T14:27:37Z" (and times close to that) and everything seems offline for me too, but that is a known problem: TTN V2 Console not working properly all the time So, for me they still forward data.
The output for /gateway-data is cached for 6 hours, so if this is due to the NOC failing, then maybe that will degrade even more soon: