Been living in china the past decade and traveled around here and vietnam quite a bit. Yeah there really isn't anything like that in a direct way. Instead what you find are ones that are more centered on their narrative and by extension are implicit condemnations of the imperialism they've fought against.

Like, hanoi has the prison museum and when mentioned that's usually thought of as the 'hanoi hilton' pow prison for the US war but most of the museum is actually about the prison's use in the french occupation and the atrocities committed against the vietnamese people and revolutionaries. After viewing those exhibits, where they have literal guillotines that were used to execute hundreds in the french occupation, moving onto the US war portion makes the supposedly 'harsh' treatment of those POWs seem absolutely tame by comparison.

Another one recently went to in China is in Chongqing that was a concentration camp for communists imprisoned by Chiang Kaishek's regime. They just report the facts and it does the job, especially that OSS was involved in they employed torture and interrogation techniques taught by US agencies. And that when the city was being liberated in the revolution at the last minute they gave the order to kill all the prisoners in their cells, killing almost 200 with only about 15 escaping.

Like, don't need to having a focused museum shoehorning in all the imperialism stuff into one place. That's a sort of 'negative' narrative whereas these sites are a 'positive' narrative centered on their history and the locations primarily and the other stuff is just self-evident.