here are a few countries that use "American" sirens.
Istanbul, Turkey has a (maybe even a few!) 500 ST-108(s).
Video: https://m.youtube.com/watch?v=YsO9g2jxyBw
There are some cyclones in Taiwan (Mostly in Taipei, but a few are in Taipei suburbs)
Video: https://m.youtube.com/watch?v=4zZMOo3vacI
In Kuwait City there is a modulator.
Video: https://m.youtube.com/watch?v=lRl_131svnE
In Latvia there are MANY 2001s.
Video: https://m.youtube.com/watch?v=I7m5Jn-E5oY
Riyadh, Saudi Arabia has Whelens.
Video: https://m.youtube.com/watch?v=bN4_zdowDwM
Afghanistan has Whelen(S).
Video: https://m.youtube.com/watch?v=0PhU-PIsUMw
Mexico has Modulators. (they use a custom tone)
Video: https://m.youtube.com/watch?v=ExPmgFQcros
Denmark has Whelens.
Video: https://m.youtube.com/watch?v=3PVT0BcK-2I
(there are way more but i'm lazy)