You can go to the matchup tab on the mobile or web app. This is where you'll see all of the points your team was projected for and has accumulated that week.
From there, you can press or click on the actual score for each player and get a better idea of how they earned those points.
On mobile, it will look something like this:
And on the web, it will look like this:
In both cases, I'm able to see how Patrick Mahomes earned 53.17 points in my league that week. 👍
You can always view these breakdowns even for past weeks, too. Go to the League tab, filter by week, then select a matchup, and then you can view the breakdown for any week.
You can also view the breakdown for any player by viewing their player card. Under the Summary tab, tap a tile for projections/final point totals.