Again, this is known issue. Many months ppl request help with this trouble. Real answer hold official Xiaomi ROM devs. They ignore it due to: "use only official service and parts". Very dead end. Here devs mostly implement known set of options not from scratch. They are not official devs.
Pretty sure devs must ignore. This isn't their, devs, problem, that MTK are not cooperating and pretty "closed" platform. Also if no cina rom for platform, almost zero chance for eu rom. Only official global or EEA.
Better not. You need to lock&unlock, cause in 99.9% chances you got china version with indian ROM installed with some strange china sellers magic. Get rid of that as fast, as could. More you are waiting, more you ll wait for relock&unlock =)