Whoa I grew up Mormon and have never once heard of this script. Super interesting. There is so much Church history that they don’t teach because it’s weird in contemporary light, and this is a great example of that.
There is a ton of info about the church that isn't widely known in Mormon circles. The CES letter does a good job covering tons of it
https://www.cesletter.org
yeah for sure, it's definitely by design. My family is quite deeply intertwined with the church, going back several generations, so it's always very interesting to see weird ways the Church tried to embed themselves. The state of Deseret and the Mormon uprisings are some of my favorite trivia to lay on people who aren't familiar with the Church and how wild it's history actually is.
Tai Le also has similar characters but some of them in the writing do no match the Tai Le Script alphabet. I.e. the cursive y with a dot in the middle or the character that looks like "-|"