Runalyze.com can do this.With Strava it’s only visible if it’s in the top 3 of your PR’s right? Maybe I’m looking at the wrong place or is this behind the Summit paywall?
You can easily export all your runs to runalyse with healthfit.
In an activity you have the option to view the best sub segments, see picture for an example.
https://blog.runalyze.com/features/analyze-time-series/
PS I'm new here, but I use WOD for a couple of years. I run also with a Stryd the last months so i'm also waiting for the update Now I press the crown to switch between the two apps.