Not sure if this is possible, tried it out but it seemed to fail.
What I’d like to do is use the Webpage Card in my Home Assistant frontend to display an embedded webpage that directs to a device on my home network, for example: my router, tasmota devices, WLED devices, etc.
I have setup a Webpage Card and it works to external webpages, but when I use an IP address to access local devices then it just directs to the Home Assistant instance in which it is running.