Hello Jonas,
Thank you for reaching out for support! I understand that you’ve uploaded your game for review, and have received feedback, but you’re not sure how to check this feedback so you can address it. I’m happy to help with this!
To review the feedback you received, I find it’s easiest to navigate from the Dev Portal Dashboard > Your Product > Epic Games Store > Release Management. In the Release Management Page, you’ll see the different parts of the product that need adjusting are marked with an exclamation point (!). You can click on each one to show which entities had feedback. Selecting the entities will show you the feedback itself. More information on Release Management can be found here.
I hope this was helpful! Let us know if you have any additional questions!