Good thing they thought of that. Disclaimer: I was at Riot During some of the Valorant dev cycle and the stated goal in this tech blog [0] was a huge goal (keeping latency < 35ms).
This was only really doable because Riot has invested significantly in buying dark fiber and peering at major locations worldwide [1][2]
I've read those articles a couple of times over the years and always found it fascinating they actually built a backbone with dark fibre. That was ten years ago so it would be interesting to see an update.