Fortinet leading the way here - they've answered specifically how they test FortiEDR updates. It's really good, more vendors should follow. https://community.fortinet.com/t5/Blogs/FortiEDR-s-software-and-content-update-release-process/ba-p/327255

My suggestion on what you should ask your EDR vendors, until they release it publicly:

(If they're unable to answer this to you and can't talk about improvements they're working on, keep asking).