Haven't listened to all songs from every NF but this is my tentative list:
ALBANIA
1. Rezarta Smaja - E jemja nuse
2. Alban Ramosaj - Theje
3. Ronela Hajati - Sekret
AUSTRALIA
1. Jaguar Jonze - Little Fires
2. Voyager - Dreamer
3. Charley - I Suck At Being Lonely
CROATIA
1. Mia Negovetic - Forgive Me
CZECH REPUBLIC
1. We Are Domi - Lights Off
2. Elis Mraz - Imma Be
3. The Valentines - Stay or Go
DENMARK
1. Fuld Effekt - Rave Med De Hårde Drenge
2. Conf3ssions - Hallelujah
3. Reddi - The Show
ESTONIA
1. Stefan - Hope
2. Jaagup Tuisk - Kui vaid
FINLAND
1. Olivera - Thank God I'm an Atheist
2. Cyan Kicks - Hurricane
3. Younghearted - Sun numero
ICELAND
1. Reykjavíkurdætur - Turn This Around
ISRAEL
1. Michael Ben David - I.M
2. Inbal Bibi - Marionette
ITALY
1. Irama - Ovunque sarai
2. La Reppresentante di Lista - Ciao ciao
3. Mahmood & Blanco - Brividi
LATVIA
1. Citi Zēni - Eat Your Salad
LITHUANIA
1. Lolita Zero - Not Your Mother
2. Monika Liu - Sentimentai
NORWAY
1. Elsie Bay - Death of Us
PORTUGAL
1. Pongo & Tristany - Dégrá.dê
ROMANIA
1. WRS - Llámame
SERBIA
TBD
SLOVENIA
1. Luma - All In
2. Batista Cadillac - Mim pravil
3. July Jones - Girls Can Do Anything
SPAIN
1. Luna Ki - Voy a morir
2. Xeinn - Eco
3. Blanca Paloma - Secreto de agua
4. Chanel - SloMo
5. Rigoberta Bandini - Ay mamá
6. Tanxugueiras - Terra
7. Azúcar Moreno - Postureo
SWEDEN
1. Cornelia Jakobs - Hold Me Closer
UKRAINE
1. Kalush Orchestra - Stefania
GERMANY /
IRELAND /
MALTA /
MOLDOVA /
NORTH MACEDONIA: