Potential additional instruction for PiHole + OpenVPN tutorial

I installed PiHole and OpenVPN on my Raspberry following the tutorial on Redirecting.... Unfortunately, after numerous attempts to meticulously follow the tutorial, my setup did not work.

Only until I added the following line to my iptables setup, I got it working:

iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j SNAT --to-source 192.168.1.2

Is this maybe an omission in the tutorial and should this be added?

Regards