Elsewhere they reference making updates to the Grafana Agent in the future, but it's hard to say what "scrape profiles" means.

But I really, really like the idea. Often when I want to test the performance of a change I'll launch test and control canary instances with a small percentage of live traffic, run perf against each, collect the data, load it into a local https://profiler.firefox.com/, and try to compare the differences. It would be awesome to automate that process. Beyond that, I often keep notes about the tests but the profiles themselves are a real pain to store and catalogue.