Windows Admin Center set HSTS max-age

Question

Hi,

I've installed Windows Admin Center (v.2306 b.1.5.2306.14001) gateway on a Windows Server 2019 Standard Server. I've run a security scan on the server and it's failing because the HSTS max-age is not equal to 31536000. I understand and can see that HSTS is enabled by default, but my question is how can I change the max-age setting? I am not able to locate a web config file and WAC doesn't use IIS. Any help would be greatly appreciated.