There should be a "No thanks, just take me to download" option. It also says "This mod is free but the developer accepts your support by letting you pay what you think is fair for the mod." which means paying for it is only optional.
it didn't give you an option to get it for free it said payment of chose meaning that it's not free to download at all go and see on Android I have an Android and don't have money at all I'm even at a shelter rn so the mod is not for free and the owner of the mod is getting money from the people wanting the mod!