No

No, that is not what will happen. All mined blocks become invalid. So all transactions in them become unmined. Unless they happen to be mined in the other chain too. Perfect time for a a large double spend... Even considering an approach that might cause a reorg is hostile to bitcoin and bitcoiner...

A chain split will create two chains, like when Bitcoin Cash happened and lost the split. It became a minority chain no ones care about; anyway there were funds loss because at first transactions would happen on both chains at once and stuff like that, it was a messy process & we definitely don't ne...