In our survival world, we killed the ender dragon and had the exit portal generate normally. We then continued to build an enderman farm and get elytra's like one does in a survival world. However, after we updated our server to 1.19.1 when we enter the end there is simply no exit portal but our enderman farm is still there.

I tried the following fixes to no avail (in this order), Also, I dug down after every step to see if the portal was buried:

1. Standing on 0,0

2. Setting my render distance to 16

3. Placing an end crystal down in the end

4. Summoning in and killing an ender dragon

5. Reverting back to 1.19

6. Deleting the DIM file for the server to reset the end (This reset the enderman farm but still not the exit portal)

7. Repeat steps 1 - 4 after the reset

8. Placing down a crystal, leaving the end, and then returning

I have looked through Reddit posts, other bug reports, and even used the help window on my server host to try and solve this problem.