TL'DR

Besides the standard way of creating web pages, it is also possible to insert custom HTML kind of code in a block. And it should even be possible to show data from the Odoo database itself there.

Simple example node code coupling

Create with Canvas

Using the proposed Odoo web page color scheme, I asked Claude to update the color scheme for AptiSort. It came back with a table with codes, no colors, so I turned to Gemini and asked to add the colors there and make them adjustable. I used Canvas for this. Here is the link for the result

https://gemini.google.com/share/bf4ea835254d

And here is the link to the chatter:

https://gemini.google.com/share/8f03d7fb5b5b

Since this did not work in Odoo, mainly because of the React import, I asked Gemini to make the code Odoo compatible:

https://gemini.google.com/share/254ce0be7e9b 

And this code block can be used

Inserting it in Odoo

The key to embedding external code is the Embed Code block:

And once embedded click on Edit

Then you can paste the code there:

Let's try that here: in editting we just see a blue banner block, but once saved, it will really show what it contains

Using database elements

This might be a bit more tricky but it should be possible through the use of Odoo's JSON-RPC and React.

See this Gemini question

https://gemini.google.com/share/1a0172fd7a5c