Can we configure site to site VPN Alta La Route 10- with third party firewall/Gateway ? For eg. FortiGate

Hello All,
I would like to know if it’s possible to configure a site-to-site VPN between Route 10 and a third-party gateway or firewall. Specifically, I have been trying to establish a VPN tunnel between Route 10 and a FortiGate FG-100F firewall, but I have been unsuccessful so far.

Has anyone configured such a setup before? If yes, could you please guide me through the necessary steps or share any configuration references or best practices?

Any help or insight would be greatly appreciated.

Thank you in advance!