OpenBlock Elevator Mod will allow you to create an elevator block that will work incredibly easy. It will be enough for you to place one block as well as the second one in parallel, and now you can move between us.
OpenBlocks Elevator Mod for Minecraft 1.16.4 / 1.16.3 / 1.15.2
If you always wanted to move extremely quickly through the floors of your building, then this mod can definitely help you. In fact, this is an extremely simple way to create yourself an elevator in Minecraft.