It depends on the configuration. I got major assistance from #[4] with my setup. You could also talk to #[5] who I think is working on the same issue with BTCpay Server.
Discussion
Thanks for getting me pointed in the right direction. With the help of npub16jzr7npgp2a684pasnkhjf9j2e7hc9n0teefskulqmf42cqmt4uqwszk52 blog post about Lightning Address Redirect I was able to get this working with my self hosted BTCPay server.
I threw you 511 as a small token of my appreciation!
I sent you two test zaps from Damus and Astral. But your link on Snort is still giving me an error:

🙏