Yemen just did a major update of its Tentative List:
They added 31 (and in Paris they're still adding),
The Cities and Landmarks of Ma'in Old Kingdom 20/06/2025
Al Madrasah Al Amereyyah in Rada' 20/06/2025
The Archaeological Remains and Water Management Systems Himyar Kingdom in Dhafar 20/06/2025
Shibam Kawkaban 20/06/2025
Erf Mountain Natural Reserve 20/06/2025
Haid Al-Jazil and Wadi Daw'an, Hadramout 20/06/2025
Al-Qarrah City, Yafe' 20/06/2025
Tarim City, Hadramout 20/06/2025
Historic City of Al-Mukalla 20/06/2025
Say'un Palace 20/06/2025
Sites of the Cultural Landscape and Heritage Landmarks in Sana'a 20/06/2025
The Archaeological Sites of the Kingdom of Hadramout in Shabwah 20/06/2025
Archaeological Sites of the Kingdom of Qataban in Behan 20/06/2025
Wetland Natural Reserve, Aden 20/06/2025
The Historic City of Aden 20/06/2025
Habban City, Shabwah 20/06/2025
Al-Hawtah City 20/06/2025
Balhaf/Burum Natural Reserve 20/06/2025
Old Incense Trade Routes 20/06/2025
Jiblah city 20/06/2025
The Historic Fortifications of Hudayyedah 20/06/2025
The Old City of Al-Hudaydah (Harat al-Sur) 20/06/2025
Shaharah City and its Bridge 20/06/2025
Sharma-Jathmun Protected Area 20/06/2025
Biodiversity Sites in Hadramout 20/06/2025
The landmarks of Ta'iz City 20/06/2025
Al Mokha City 20/06/2025
Historic City of Saada 20/06/2025
Dar Al Hajar 20/06/2025
Baraqish City Archaeological Site 20/06/2025
Agricultural Terraces in Yemen 20/06/2025
One is a replacement for: Balhaf/Burum coastal area. There may be more.
Seems to be the outcome of these workshops. where "The sessions concluded with the proposal of 37 sites for nomination, ranging from archaeological sites, historic buildings, and fortifications to cultural landscapes and mixed and natural sites. ":
https://www.unesco.org/en/articles/unesco-and-arab-regional-centre-world-heritage-lead-efforts-revise-yemens-world-heritage-tentative