Carefully check the leakage hole and tighten it.
You can replace the new drain pipe yourself.
If it is an iron pipe, you can wrap the raw material belt around the leaking place several times, then apply glue and wrap it tightly with rubber belt.
If it is aluminum-plastic pipe or PPR pipe, you can ask a plumber to cut off the water leakage and connect it with a joint.
If it is PPR, you can cut off the missing part and connect the two ends directly.