I'm not knowledgeable on the conflict, but it seems that most ML parties hold the position that Kashmir should be allowed to decide its own future.
04/08/25 - CPI (Marxist) : "Full statehood and democracy"
10/17/19 - CPI (Maoist) : "Our revolutionaries, PLGA (People's Liberation Guerrilla Army) and other frontal organisations would go to Kashmir and help people in their struggle for independence,”
08/05/24 - CPP: “We remain steadfast in our support of the Kashmiri people’s inalienable right to self-determination."
12/04/19 - CIPOML (The international that APL is part of): "CIPOML also declares its solidarity with all the oppressed peoples and liberation struggles with primarily those of Venezuela, Iran, Palestine, Kurds, Cuba and Kashmir"
So you've basically got 3 separate ML tendencies here, and 3 of these statements are from parties that would be familiar with the region. Some of these groups have made more recent statements but nothing that contradicts anything they previously said from what I can tell.
That's what I'm saying! It's kinda awesome how long things get supported in linux land!