You'll be fine.
I spend a lot of time on the trainer. In fact, I've worn out two fluid trainers over the last 15 years. Out of the saddle sprints are fine. Hard efforts are fine. Your bike is not going to break on the trainer. I've done aluminum and carbon bikes on the trainer. You might scratch up the skewer. The only issue my wife or I have ever had is that the RD hanger bolt somehow got stripped on her Specialized Amira on her Kickr. The RD hanger just fell off once she took it off the Kickr. We replaced the hanger and everything was fine.