Ukrainians didn't "hold their pride march in a subway".
10 minutes after the 2024 Kyiv pride march started the marchers were dispersed and ordered onto trains by police in response to a large and violent right wing counter demonstration. The Ukrainian right has organised violent counter demonstrations every year since it's inception in 2012. They regularly prematurely end the march and have hospitalised dozens of marchers.
Violent crimes against queer people are not legally considered hate crimes in Ukraine. The punishment for assaulting a queer person is often just a small (less than 100 Euro) fine. The main goal of Kyiv pride is to change this.
"russian bombs" did not cause this, but they haven't helped. There are very few safe places for internally displaced LGBTQ+ people, especially those from Kharkiv and Donbass. They find it harder to find shelter and work than other IDPs, and are subject to heightened rates of physical and sexual violence.