Sorry, adding a thought here: this framing (physics as an achievement) had me a wee bit concerned for you, especially when you hit the next point about wanting to look more well-rounded.
a) you don’t have to be well-rounded! But you should find things aside from academics that bring you joy, maybe especially things that you can do with other people.
b) I worry about pushing yourself to rack up more achievements. There’s something undeniably satisfying about a quantifiable outcome and seeing your name on a list of smartest-kids-ever! but my sense is that what happens with physics research is really different (source: married into family with two physics professors; husband was in physics PhD program at Harvard when we met; dated different physics PhD student before). The skills they seem to rely on are really different from, say, studying and test-taking skills. There’s a lot more about creativity and curiosity and being will to try things that don’t necessarily seem like they will work. I wonder if there’s a way to flex those sides of your personality a bit more.