How to reset the end properly

So basically I reset the end because my generation was garbage, with barley any end cities. I reset the end by deleting the DIM1 file and then starting the server.

but once I went back to the end, I saw that the crystals on the end towers were back, but the end dragon and the portal back to the overworld are missing. How do I fix this so I can get back to the overworld?

yall are actually unhelpful asf
I fixed it myself so I guess this can close.