Sadly Sean, as daft as it may seem being that Taiwan is the largest bicycle manufacturer in the world, most bikes you see in manufacturers web pages are not available in Taiwan, and none sell L or XL sized bikes here (a friend took 18 month to get a L sized Giant MTB here and that ended up with the dealer going to giant factory in Tainan and picking up a rejected frame and building it in his shop (factories are also not flexible...). The local bike scene is heavily road orientated. Local riders don't need low gearing as the physique of most riders here tends to be small, and very fit... Clydesdales and Athenas hardly exist... Taiwan makes bikes to export. Most of the brands in the lists in your post are not available. Giant only has 2 gravel bikes in their line up here, the Revolt Advanced 0 and Advanced 2, and so far I have only found one in the flesh, an Advanced 0, and is S sizing, that was a shop in Taipei. Giant the biggest bike manufacturer in the world, and a Taiwanese company don't even had a flagship store in Taipei, the capital of Taiwan..... its a weird scenario. Fuji have a great website here for Taiwan, and the have the Jari, 1.1, 1.3, 1.5, 1.7 and 2.5 all listed and with pricing for Taiwan, but I been to the 4 Fuji dealers in Taipei and only found only the 1.1 and 1.3, again only in small...
To add to the struggle is that most dealers have no web page, here people use Facebook as their shops contact... and of course its all in Chinese.... and rarely carries stock news about what bikes they actually have in their shops. The good point is that Taipei is not a huge city and getting around by bike is hairy but easy...
Before the "plague" i traveled a lot and could pick up a bike and just bring it with me back to Taiwan... all that stopped in February 2020....
But I'm in no hurry, I like the search process, and have even now found a shop that can make me a steel framed bike... and I do like steel..