Will my mini-ITX build face heat issues with an AMD CPU?

AMD CPUs are generally efficient with heat. They’ll run at high performance until they hit around 95°C and then stabilize there, which is typical behavior. If you ever want to lower temperatures, undervolting the CPU can be a smart way to do it.

You should be good with your setup! Since you’re using a Noctua cooler, it should be quieter than stock options, but don’t expect it to cool significantly better – maybe just 2-3 degrees difference overall. Just keep in mind that the size and design of ITX cases can limit cooling options. If you're considering a AIO cooler, a 120mm single fan isn't much better than what you have.

Also, if you need more airflow, a small house fan can be a good idea to help direct some cool air towards the case.

Are you set on the Fractal Terra case? It’s sleek, but not the best for temperatures. In my experience with SFF builds, I prefer something like the Lian Li A4 H2O that can fit a 240mm AIO cooler, giving you much better thermal performance. That said, I understand space constraints can be a big factor in your choice.

With the 7800X3D, you might want to upgrade to an NH-L12S cooler for better performance. As for your GPU, going for a model that takes up two slots, like the Reaper or Hellhound versions of the RX 9060XT, can definitely help with heat management.

I've been running a solid build myself with an AsRock B650i and noticed great stability over a year. Plus, if you’re planning on upgrading your components down the road, I suggest getting a good PSU like the SF1000 for extra headroom.