Hello

I have L2TP/IPSec link between Router A and Router B.

Router A
L2TP/IPSec Tunnel IP Address 192.168.44.1
LAN IP 192.168.20.0/24
Mikrotik Router LAN IP 192.168.20.1

Router B
L2TP/IPSec Tunnel IP Address 192.168.44.2
LAN IP192.168.2.0/24
Mikrotik Router LAN IP 192.168.2.1

I can access LAN network from both sides but I am unable to ping/connect to my remote Mikrotik either via Mikrotik LAN IP or L2TP tunnel IP address.

anyone please help me.

Thanks

Do you have the proper input accept firewall rules for the VPN interfaces in place?

As your routers are on different subnets to the LAN networks you will need to add phase two policies and NAT rules to establish connectivity. You won't be able to use /16 as both LAN networks are class C.

As mentioned above check filter rules or allow access from Site A's public IP address and connect over WAN.