I need to activate the VPN on IPFire.
IPFire is connected to the router (see image attached) and I access it via a static public IP.
On IPFire, I have opened port 1194 and created the openVPN profile, which I imported into OpenVPN Community Edition on IOS and on PC.
However, I am unable to connect. Do I also need to set up port forwarding on the router
This is not needed but you have to add a port forward for port 1194 to the RED IP of the IPFire in the Fritz!box. Without this a connection attempt not reach the IPFire.
So do what it says. Check your connectivity! In particular, it looks like OpenVPN is using UDP (good, better than TCP) but your FritzBox seems to be forwarding TCP?