It's lists a few objectives reasons why:
It attributes the rise to several factors including blood transfusions for wounded soldiers, reusing syringes in field hospitals, and soldiers engaging in unprotected sex and drug use.
Including that Russia already had a very high rate:
The report also highlights the wider HIV situation in Russia which since 2022 has been among the top five countries worldwide for new HIV cases, behind South Africa, Mozambique, Nigeria, and India.
Then ignores the two previous paragraphs
"There is no objective reason why HIV should be decreasing across the world — except in Russia. The factors behind this are purely political," the report said.