I currently use the following playset to ensure that my mods are working as intended and the dependencies are all present. If you have problems with Empires not showing up, please copy the text below into a json file and import it as a new playset, launch the game with that playset, and confirm that all the expected empires are showing up.

Downloadable version (click the "download raw file" icon on the right):

https://github.com/Osiris1975/osiris-empires-ancient-civilizations/blob/main/assetts/Osiris%20Mods%20Testing.json

Copy/Paste version:

{"game":"stellaris","name":"Osiris Mods Testing","mods":[{"displayName":"z Expanded Traits, Civics, Pops, and More","enabled":true,"position":4,"steamId":"1620838511"},{"displayName":"Planetary Diversity","enabled":true,"position":5,"steamId":"819148835"},{"displayName":"Stellaris Evolved - Alpha","enabled":true,"position":6,"steamId":"2602025201"},{"displayName":"Planetary Diversity - Exotic Worlds","enabled":true,"position":7,"steamId":"1732437279"},{"displayName":"Planetary Diversity - Gaia Worlds","enabled":true,"position":8,"steamId":"2284514368"},{"displayName":"Planetary Diversity - More Arcologies","enabled":true,"position":9,"steamId":"1732447147"},{"displayName":"Planetary Diversity - Ringworlds","enabled":true,"position":10,"steamId":"2391277656"},{"displayName":"Planetary Diversity - Shroud Worlds","enabled":true,"position":11,"steamId":"1960179456"},{"displayName":"Planetary Diversity - Reworked Habitability","enabled":true,"position":12,"steamId":"1807850864"},{"displayName":"Planetary Diversity - Planetary Habitats","enabled":true,"position":13,"steamId":"1878751971"},{"displayName":"Planetary Diversity - Space Habitats","enabled":true,"position":14,"steamId":"2171564735"},{"displayName":"Planetary Diversity - Unique Worlds","enabled":true,"position":15,"steamId":"1740165239"},{"displayName":"UI Overhaul Dynamic","enabled":true,"position":16,"steamId":"1623423360"},{"displayName":"UI Overhaul Dynamic + Planetary Diversity","enabled":true,"position":17,"steamId":"1623423504"},{"displayName":"Stellaris Evolved UI Overhaul patch","enabled":true,"position":18,"steamId":"2602737136"},{"displayName":"Stellaris Evolved - Planetary Diversity Patch","enabled":true,"position":19,"steamId":"2921449990"}]}