Problem connecting to FortiGate IPsec VPN via remote access

Good afternoon everyone, I currently have a fortigate 40F in the office, connected directly to the internet company's router, the fortigate 40F has a connection to the router through the fortigate WAN to a LAN of the internet company's router. My goal is to connect to the IPsec VPN from my home for example...

1. The router has the DMZ activated towards the fortigate IP.

2. The IPsec VPN works if I am in the subnet (office LAN) of the FortiGate, that is, in the office, but from another location it does not work even if I put the public IP in the Remote Gateway of the fortigate client for Windows.
3. I have a user configured with a local password...

Any ideas on how to get the VPN to work?

Thank you.