Essentially, I have set the store up so the suffix for each page title is "- CompanyName" but I would like to know how to create an exception for this for the home page.
It's not configurable with admin, you have to exclude it externally by code, I believe the below answer will surely help you :
Hope it helps !
anyways to just update the xml ? i dont why magento 2.3.5 does not have this any more.