I have played both Alubari and Formosa Tea. I sold on Alubari because at the time it seemed like a good idea (with more space I might have kept it). Also friends still have that one. I enjoyed both. In Alubari you build a train route to Darjeeling. The theme is present mostly geographical. We had a ton of fun playing this once at Spiel but once at home my partner wasn‘t inclined to pick this over other games. And the solo didn‘t fascinate me enough.
In Formosa Tea which is also a worker placement game you actually produce tea. I would say there is more tea theme in that one. It is also pretty and a design from Taiwan which I appreciate as an outlier in my collection. It has some interesting thing where depending on where you place your workers you move up a track as well that allows you to produce certain kinds of teas. I must say it has been 2 years or so since I played and my memory is a little hazy. The only thing I remember is that I knew it was staying in my collection. I must have posted on the Recent Games thread.
There is also a game called Ceylon which I saw at Spiel but never managed to check out. That one is about managing tea plantations I think 
It also looked really pretty. I have no idea if it is in print.
Another one I have not tried has been previewed by SUSD at some point Chai Tea for 2 it looked good but it is a 2 player only game.
PS: these days I also enjoy coffee more but I lack a good coffee themed game. I have Coffee Roaster as an app and I considered and rejected Coffee Traders.