Time signature in Ayu's songs

[Surreal17]

As many of us already know, 4/4 is the most common time signature in rock, blues, country, funk, and pop.

What ayu songs are composed in a more unique / unconventional time signature?

From what I read regarding this subject, Dolls and petal seem to be in 6/8. This actually makes sense, since both songs have that flowing vibe to it.

Also, is SCAR 3/4 or 6/8?

Humming 7/4 is another interesting case.

I'm not good (just started lol) at reading measures in music but I really like to know more about this.