Matching Numeric Data across two columns?

What I thought would be a simple formula has taken me over 2 hours of searching and no results as yet.. So im reaching out for help please.

Heres where Im at.

- Using 16.108.2 version

- I have 2 sets of data of differing row amounts. There is one numeric column in each set that definitely has matching numbers across them. I need to see which numbers are matching and which numbers aren't.

- I need to align those 2 columns where the numbers are matching, and also keep all other information aligned across the columns that are alongside the 2 I am matching.

I have tried the XLOOKUP formulas that I can see listed when i do a google search, but i cant get it to work, either some information or step is being left out, or I am finding the wrong info on how to do this.

Can anyone provide a step by step on this please?