How to Match Additional Data to Companies During Separate Uploads

Also, is it possible to match company data to a specific company when uploading separately? For example, if I uploaded a list of companies first & have their basic data (website, LinkedIn profile, industry) Then later I found their online review platforms (ex: feefo profile) + their rating.. Is it possible to upload that additional data & match it to the company? If so, how? Quick video explanation: https://www.loom.com/share/5246a0af6da747a39ad92c168679e600?sid=1b8be814-8e53-4d2e-a51c-63bceddc2b04