Please help with my first chocolate lab

I have a beautiful almost 1 year old lab and she has gone from an energetic sweet dog to an energetic monster that never settles down.

We go to the park everyday for about 30-45 minutes (weather permitting) and play fetch/walk around. That used to be enough for us to come home and she’s somewhat chill for the rest of the night.

Now we come home and she’s just restless until she falls asleep. Did I do something wrong? I’m not sure what to do with her. I’m worried more exercise won’t be good due to the amount of heat going on right now.