This mod rewrites the generation of end cities to make them much larger and with many more branching paths.
The config file can be used to modify the:
Max number of ships per city
Max height of each middle tower
Length of the bridges
the best values i have found is 6 for the middle towers, and long for the length of the bridges.
Though there will be some cities that are cut off at height limit.
If you are using this mod with BetterEnd then you should lower the settings as the start points will be placed higher up, causing more cities to be cut off at build height.
For those that prefer Modrinth:
Bigger Better End Cities - Minecraft Mod (modrinth.com)
For better looking end cities here are some good options:
Vanilla: "Vanilla Better End City" - Resource Packs - Minecraft - CurseForge
or
https://www.planetminecraft.com/data-pack/better-end-city-by-ichphilipp/
Fabric Better End: "Better End City" for Bette... - Resource Packs - Minecraft - CurseForge
or
https://www.planetminecraft.com/data-pack/better-end-city-for-better-end-by-ichphilipp/