Duchy of Tuscany, leader Archduke Joseph Ferdinand of Tuscany (Neutrality and fascism parties) https://en.wikipedia.org/wiki/Archduke_Joseph_Ferdinand_of_Austria
Papist state : leader Pius XI https://en.wikipedia.org/wiki/Pope_Pius_XI (Neutrality)
Alfredo Ildefonso Schuster (Fascist party) https://en.wikipedia.org/wiki/Alfredo_Ildefonso_Schuster
Leader of Prussian Democratic Republic : Hugo Eberlein https://en.wikipedia.org/wiki/Hugo_Eberlein
or August Thalheimer https://en.wikipedia.org/wiki/August_Thalheimer
Leader of Republic of Prussia : Gustav Bauer
https://en.wikipedia.org/wiki/Gustav_Bauer
Sardinia
Neutrality - Victor Emmanuel III
Democratic - Emilio Lussu https://en.wikipedia.org/wiki/Emilio_Lussu
Corsica
Democratic: Pietro Rocca https://en.wikipedia.org/wiki/Pietro_Rocca
Fascist Petru Giovacchini https://www.revolvy.com/main/index.php?s=Petru%20Giovacchini
Brittany
Fascist: Olier Mordel
Bavaria
Communism: Ernst Toller https://en.wikipedia.org/wiki/Ernst_Toller
Wurtemberg
Neutrality: https://en.wikipedia.org/wiki/Pauline_Therese_of_W%C3%BCrttemberg
Oldenburg
Neutrality: Nikolaus, Hereditary Grand Duke of Oldenburg https://en.wikipedia.org/wiki/Nikolaus,_Hereditary_Grand_Duke_of_Oldenburg
Saxony
Neutrality: Frederick Augustus III of Saxony https://en.wikipedia.org/wiki/Frederick_Augustus_III_of_Saxony
Communism : Max Seydewitz https://en.wikipedia.org/wiki/Max_Seydewitz or Ruth Fischer https://en.wikipedia.org/wiki/Ruth_Fischer
Meklerburg
Neutrality : Frederick Francis IV, Grand Duke of Mecklenburg-Schwerin
https://en.wikipedia.org/wiki/Frederick_Francis_IV,_Grand_Duke_of_Mecklenburg-Schwerin
Rhenish Republic
Democratic : Josef Matthes https://en.wikipedia.org/wiki/Josef_Friedrich_Matthes
Communism : Hans Marchwitza https://en.wikipedia.org/wiki/Hans_Marchwitza or Wilhelm Florin https://en.wikipedia.org/wiki/Wilhelm_Florin
Also, you should add South German Federation (Bavaria and Wurtemberg), North-German Federation (Hannover, Oldenburg, Holshtein),Kingdom of Two Sicilies (Naples and Sicily).

Change the flag of the fascist Far Eastern Republic to the flag of Transamur from Kaiserreich Mod, leader - Grigory Semenov, the flag of democratic Siberia should be changed to a green and white flag, the name of Communist Moscow - Moscow Socialist Republic, neutral Kazakhstan - Alash Orda https://en.wikipedia.org/wiki/Alash_Autonomy
Also, flags of democratic Turkestan and neutral Turkestan should be swapped. Leader of neutral Turkestan - Mohammed Alim Khan https://en.wikipedia.org/wiki/Mohammed_Alim_Khan
Democratic Leader - Mustafa Shokay https://en.wikipedia.org/wiki/Mustafa_Shokay
Fascist Leader - Nuri Killigil https://en.wikipedia.org/wiki/Nuri_Killigil