I’ve had this reoccurring thing every year or so where I remember this book I read in like 5th - 6th grade that was really fucking good every year or so. I need to find it, I try every time but no amount of Googling thin recollections of its plot has got me anywhere.
The Girl From Everywhere has a theme of time travel via maps and includes 1800s Hawaii.
Clockwise by Elle Strauss includes a girl time traveling to the 1800s.
Three people time traveling via book and eventually involving three related girls could be The Time Warp Trio series. No mention of the 1800s specifically though.
Edit: The Emerald Atlas checks more boxes than any of these and is probably your best bet.