As we all know not everyone can do arms behind. I would make sure she is streching her shoulders. But to your question.

at an RSG of KC rope lab I got the idea to do a box tie with arms in front but tge rope work behind. I saw that bunnies that could not do arms behind felt bad because their rope looked so different.

Start with your double column tie in front with your friction at the bottom instead of the top. Sthe next part is fun. Crotch rope(yay). Then build your tie as if the stem came from her arms. Its not 100% the same but the bunnies like. They lije the look better and who doesn’t love crotch rope!!!. I did have one bunny that let her arms droop down ward that was an easy fix. But fir most that won’t be an issue

I have not tried suspension from this tie so I would recommend against it. But only because I haven’t tried it.