WebEngine Vs WebAssembly

[yuva]

I am new to web relate GUI development.
I am not quite sure which SW component to use for my application.
My requirement:

1. GUI should be web browser based which could be accessible from anywhere (internet connection) and from any device (mobile, laptop, desktop) using the dedicated IP address and Port.
2. Application should be running from Raspberry Pi CM4 (probably seed studio mini router)
3. OS may be Raspbian and/or OpenWrt.
4. Should send and receive messages using MQTT

I tried some example web assembly codes, which uses the html page implementation.
Not sure if it is the right module to use for such requirement.

Kindly suggest and I appreciate your help.

[sierdzio]

If you need to access/ show your app via a web browser then WebEngine won't help you at all.

You can use WebAssembly or any different web framework (Cutelyst, Django, RoR etc.)