India and/or Bhutan may have objected to Chinese presence there at the time, but had accepted it by 2017, the time of the standoff. This doesn't mean that Bhutan doesnt still claim the entire Plateau, like it does other areas controlled by China.It's controversial? Who said that. You made a claim that this was disputed. I'm asking you to show what location is disputed and prove it is disputed. I'm only aware that the southern part is disputed and that was when China wanted to negotiate with Bhutan for that disputed section. It did it the proper way, diplomatic negotiations where Bhutan could refuse and ask for a better deal than what China offered. It didn't annex it, it wasn't invaded, there was no violence or threats.
Remember that India interjected and stopped the negotiations and at that point there was an impasse. China didn't force anyone to do anything and in fact the result prove all this.
So the thing I am asking for is for you to prove that the northern part where China built its road (that wasn't objected to by India or Bhutan) is disputed and that China certainly used disputed land to build on.
This is the general area on google maps, which shows the entire plateau as being within Bhutan despite there being plenty of roads from China in the north, in addition to new PLA camps built since 2017 in the northern part.
The point is, Bhutan had rejected China's offers for other areas going to Bhutan in exchange for the rest of Doklam down to Jampheri going to China.