Routing issue between multiple subnets/pfSense- boxes

[SNR]

Hi all,

To connect 3 buildings with own subnet and firewall/ pfSense- routers, we use two beam radio devices.

Take a look at this schematic drawing:

Following configuration is done in
pfSense 1:

Gateways:

Interface setup for OPT/RF2:

Static routes:

Firewall rules for OPT/RF2:

pfSense 2:

Gateways:

Interface setup for OPT/RF1 and OPT/RF2:

Static routes:

Firewall rules for
OPT/RF1:

OPT/RF2

I can connect from 192.168.0.0/24 to 192.168.12.0/24 and 192.168.1.0/24.
From 192.168.1.0/24 I can connect to all over subnets.

But from 192.168.0.0/24 the 192.168.12.0/24 and 192.168.2.0/24 is not reachable!
192.168.2.0/24 can not connect to 192.168.12.0/24 and 192.168.0.0/24, too!

What is missing? How can I route traffic between all subnets?

Kind regards
SNR