I’ve been baking sourdough bread for many years in my Rec Tec pellet grill:
The results are great. Mine is the older model, the new one is stainless steel. The Emile Henry Bread Cloche just fits in the 7" tall opening.
Last nite I made sourdough pizza for the first time on a pizza stone. The grill/stone reached almost 600F on the “full” setting. I was so excited when I opened the grill and saw a perfect pizza, it was devoured before I thought to take pictures! This is about as close to a wood fired pizza as you can get.
Best regards and happy baking