I’m blogging about this because I always seem to forget where to find the status of the Tier-0 Logical Router, basically which edge transport node is Active and which is Standby for that specific Tier-0 Gateway. It’s easy once I remember, but hitting the search engines doesn’t show anything useful, so I’ll try to keyword spam this to get more visibility for the next time I forget.
TL;DR: Switch to Manager mode. Click the Networking tab, Tier-0 Logical Routers, select the T0 you want. Look under High Availability Mode (screenshot below)