Basically what the title says. I want to buy the game through the ukraine bundle, but since steam adapts prices to my country's economy, the dlc would cost me half the price there. Is it possible to download and install the dlc through steam and then copy that data into Itch's version directory and make it work?

Edit: This also applies to GOG since both game and dlc are straight up cheaper there

I don’t think steam will let you buy the DLC without the game, but if you can get a copy of the DLC files out of either, you can manually install them into the game directory.