OpenVPN Site to Site VPN unable to reach internal networks

[Skier9234]

I've been pulling my hair out setting up a site to site vpn with OPNSense. I followed the official guide with one exception, I'm using certificates. And I saw in a video that the interfaces created by the server and client have to be enabled, which I did. The VPN connection is established but I'm not able to ping anything from the server or client side. I'm just starting out with firewall rules so my apologies if this is something really simple that I don't understand yet. I'd like to say thank you in advance for any help.

https://docs.opnsense.org/manual/how-tos/sslvpn_s2s.html

More detail regarding the setup:

Site A (Server):
OpenVPN server config (legacy)

Server Mode: Peer to Peer (SSL/TLS)
Protocol:UDP4 Device Mode: tun
Interface:WAN
Local Port: 1194
TLS Authentication: Disabled
Peer Certificate Authority: local-ca
Server Certificate: local-crt
Encryption Alogorithm: AES-256-CBC
Auth Digest Algorithm: SHA512
IPv4 Tunnel Network: 10.10.100.0/24
IPv4 Local Network: 192.168.0.0/24
IPv4 Remote Network: 10.19.0.0/24
Compression: Enabled LZ4 v2

Interfaces:
VPN interface: enabled

Firewall Rules:
WAN: Protocol UDP4 Allow any on Destination Port 1194 to Destination This Firewall
OpenVPN: Protocol IPv4 Allow any (no changes/default config)

Site B (Client)
OpenVPN client config (legacy)

Server Mode: Peer to Peer (SSL/TLS)
Protocol:UDP4 Device Mode: tun
Interface:WAN
Remote server:
Host or Address: 1.2.3.4
Port: 1194
TLS Authentication: Disabled
Peer Certificate Authority: local-ca
Server Certificate: local-crt
Encryption Alogorithm: AES-256-CBC
Auth Digest Algorithm: SHA512
IPv4 Tunnel Network: 10.10.100.0/24
IPv4 Remote Network: 192.168.0.0/24
Compression: Enabled LZ4 v2

Interfaces:
VPN interface: enabled

Firewall Rules:
OpenVPN: Protocol IPv4 Source: 192.168.0.0/24 Allow any (no changes/default config)