I can confirm that chrooting to Debian Buster Armhf seems to work perfectly to run Wine x86 under Box86 on Manjaro Arm. And the graphics is amazingly good for LLVM Pipe drivers. Much better than Qemu.
Sketchup 7.1 running on Aarch64 Manjaro
FreeDraft running on Aarch64 Manjaro
Game Typer Shark running on Aarch64 Manjaro
To compile properly, use my command on armbian forum. To install schroot and debootstrap, use:
yay -S schroot debootstrap
Everything is the same command from here, except for the first line:
Hope that helps!
Many thanks
rna