This looks like a big flush. The second year is supposed to be the best year according to several publications.
This was the “Beltane” strain of shiitake planted in our logs in 2020.
I inoculated this log with shiitake in 2020. Each arrow points at a pin. The black areas on the log are a “weed” fungus known as hypoxylon. The hypoxylon will reduce the long-term yield of the log. But for now I can enjoy delicious shiitake. This was the strain called “Beltane”.
This log has a few more shiitake “pins” on the back side, not visible in this picture.