How can I route one VPN to another VPN?

We have a VPN for WFH capabilities. We also have a VPN from our office to our cloud environment (Azure). We are able to reach the office resources from home and the Azure resources from the office, but we aren't able to reach the Azure resources from home. Would I need to configure this on the Firewall (Azure VPN), or the Office VPN?

Information:

WFH VPN:

• Windows VM
• 192.168.0.0/24 subnet at office
• SSTP with IPSec for MACs

Azure VPN:

• Fortigate <-> Azure Gateway
• 192.168.50.0/24 subnet in Azure
• IKEv2
• Route-based

If you can tell me anything about how I get WFH traffic to Azure that would be really helpful!