I have a nanopi r4s and OPENWRT_RELEASE is OpenWrt 19.07.5 r11257-5090152ae3.
I've tried to install cryptsetup but I've got this error :

# opkg install cryptsetup
Installing cryptsetup (2.1.0-2) to root...
Downloading http://downloads.openwrt.org/releases/1 ... ex-a53.ipk
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for cryptsetup:
* kmod-crypto-user
* opkg_install_cmd: Cannot install package cryptsetup.

Can you provide this package please ?