Change redirect of router.asus.com

[jernau]

I have a custom letsencrypt cert enabled on my router (rt-ac3200) coupled to a custom domain. Is there any way to change the default https redirect for things like the aiprotection block pages etc to point to my custom domain rather than router.asus.com as it’s a bit pointless having the signed cert as I still have to accept the invalid cert when the redirect is not for my custom domain. Apologies if I have missed a setting in the UI for this but seem unable to find anything

Many thanks