Running sshuttle on (rooted) Android uses wrong .ssh folder ?

When I use sshuttle to try as an Android VPN I tried first running in a Termux terminal (Termux being a Debian based interface on Android):

sshuttle -r admin@server 0.0.0.0/0

I installed sshuttle by pip install sshuttle. Termux has a package manager like Debian and I installed Python 3.9 including pip on it as I use more tools using Python in Termux.
The sshuttle command lets Magisk prompt for allowing root access for Termux which I consented. But the command failed. Then I first started a root shell with sudo bash and the I ran the same command.

Here is what I attempted (connected with SSH into Termux on my Android phone):

~ $ sshuttle -r user@server 0.0.0.0/0 -x 192.168.0.0/16
/usr/bin/env: ‘doas’: No such file or directory
fw: fatal: You must be root (or enable su/sudo) to set the firewall
c : fatal: All attempts to elevate privileges failed.
~ $ sudo sshuttle -r user@server 0.0.0.0/0 -x 192.168.0.0/16
Bad owner or permissions on /data/data/com.termux/files/home/.ssh/config
c : fatal: failed to establish ssh session (2)
~ $ su 
:/data/data/com.termux/files/home # echo $PATH
/sbin:/sbin/su:/su/bin:/su/xbin:/system/bin:/system/xbin
:/data/data/com.termux/files/home # 
:/data/data/com.termux/files/home # sshuttle -r user@server 0.0.0.0/0 -x 192.168.0.0/16
/system/bin/sh: sshuttle: inaccessible or not found
127|:/data/data/com.termux/files/home # ^D
~ $ 
logout

When I started su it opens a separate shell using the Android root shell which cannot find sshuttle at all because the PATH (and other environmental) settings are different.

Weird, as when I run echo $HOME which returns the correct path /data/data/com.termux/files/home/.suroot which is the home folder for elevated commands under Termux. That folder and it subfolders are correctly owned by root and not Termux user(u0_axxx). But the error shows the 'standard' home path of Termux in normal (non-root) mode. I'd expect that it uses the folder /data/data/com.termux/files/home/.suroot/.ssh.
How does sshuttle handle with the .ssh folder ?

Reproduce the reported commands in Termux, comparing normal execution, sudo, and su, and inspect the differing HOME and PATH values plus the reported .ssh/config path. Done means establishing which home and SSH configuration sshuttle uses for elevated commands and documenting or correcting the behavior for this Android setup.