which region do they belong to right now because they played in CIS qualifiers but they are a European team
Latvia is in EU there is nothing political about it, Ukraine is political they are not in EU or CIS, They are basically at war with CIS leader Russia, so it might even be offensive to call them CIS. But tbf there are no countries specified by Riot who is where, any EU team can play in TR or CIS qual or vice versa, its not against rules.
EU or CIS are not geographical, you can find CIS and EU countries on every continent except Australia.
Also I was talking about political problems regions like EU or CIS bring up and Valorant doesn't want to deal with them, that's why there are no hard locked regions any team can pick any region as long as they are from EMEA. So the only way we can decide if team is EU or CIS is using real life examples as Riot doesn't tell us.