All ironman compatible and should run with 1.30.x patch (Emperor DLC, 2020). Some of them might run with newest patch.
UI improvements:
Bigger UI V.1.30,
Better Font Mod,
Europa Aesthetic Arrows Only,
Coloured Mission Tree,
Cmushi's Simpler Terms Mod,
A Rev. Font Mod - Theatrum Orbis Terrarum White,
TBARW Extra: User interface (Lite),
Bigger Outliner,
Best Unit Type+,
DLC Subscription Remover,
Maps:
Duck's Map Overhaul Modpack,
Flags:
Authentic Flag Improvement Pack 1.30,
Cantons for Colonial Flags,
Rebel Flag Variety Pack,
Visual extensions:
Norse Event Window (The Great Exhibition Version),
New Quotes,
Better Terrain Pictures,
The Great Exhibition,
Music:
Even More Music Mod Is Back,
IJMS Music Overhaul,
Mirror: link (all in one archive)