Add custom attributes to users (or devices) to map hardware peripherals

Hello everyone,

I am seeking some help, guidance or suggestions with the following situation.

We are looking for a solution that could map peripherals (such as monitors) to a user or a device. Once we have that info, we will utilize an additional tool to extend our visibility over the assets & assignments.

I reviewed a few documentations and videos about potential solutions, and I just want to know if that's possible or I should not invest time on it any longer.

The scope is the following:
1. We've collected information about connected monitors using Intune Script detection. That's perfect. It already maps devices with monitor's serial numbers and other details.
2. Export in CSV is fine (although, the data is not a 100% accurate, we have an internal data base that we can compare).
3. Now, how can we properly map that data to the cloud objects? What the best approach is? Logically, the monitors should be added to the devices, but Intune Custom Attributes are not easily populated/managed (?). On the other hand, Entra AD is capable of managing such expressions and overall has better capabilities (or am I wrong?) when it comes to operating with cloud objects.

I am really looking for a human response; more of a knowledge share. I'd appreciate if someone shares their experience with similar scenarios. :)

I apologise in advance if my question is not in the right section.

Docs:

https://learn.microsoft.com/en-us/graph/extensibility-overview?tabs=http

https://www.reddit.com/r/AZURE/comments/1e5z3kv/add_customextension_attribute_in_entra_id/

https://www.reddit.com/r/AZURE/comments/1dz4cru/comment/lcdf2ev/?context=3&share_id=UqZR0m9s-9SWiHOiVwwAM&utm_content=1&utm_medium=ios_app&utm_name=ioscss&utm_source=share&utm_term=1

https://www.youtube.com/watch?v=kBm-fjqg0PU

https://www.youtube.com/watch?v=LHXfFoygiOA

Thanks :)