The phrase "divergence on" is not correct or usable in written English.
You could use the verb "diverge" in a sentence, such as "The opinions of the two groups diverged on the issue of taxation".
There has been a divergence on Wall Street.
But there is some divergence on the issue of pursuing revenue through taxes.
There is too much divergence on rules between arm-wrestling associations.
But the Ottawa talks ended with a wide divergence on how the surveillance should be conducted.
Estes, S. & Arnold, S. J. Resolving the paradox of stasis: models with stabilizing selection explain evolutionary divergence on all timescales.
There was a similar divergence on policy between regional Fed banks and their Washington counterparts in 1928.
There is also a continuing divergence on how far Iran is today from developing a bomb.
The policy divergence on integration versus markets is really a question about how we want to live together as a society.
In the aftermath of the crash, there is wide divergence on how easy, or how hard, it should be to become a homeowner.
He said that there was already regulatory divergence on the island – for instance fireworks are legal in Northern Ireland but not in the republic.
The historic nature of Haaland's candidacy probably helped distinguish her in a race with little divergence on policy, said Joe Monahan, a longtime New Mexico political blogger.
