This new blog article you cite points out problems with 7 of the 257 cases included by the Hoeg study -- intermixed with a healthy dose of stay-in-your-lane-bro rhetoric. It also makes unfounded criticisms, such as "The claim from the study authors is that they replicate the [ACIP analysis] and found a much higher incidence than previously reported." In fact, the paper is clear that they follow a different method, and it claims "using these broader [emphasis mine] search and inclusion criteria, we found post-vaccination rates ... that exceed the rates previously reported."
This looks like someone is nit-picking when, in the big picture, considering the general concurrence with results from other studies, including other data sets, the findings are not misleading.
One recent publication: 370 / 1,000,000 rate of acute myocarditis/pericarditis following 2nd dose of Comirnaty in male adolescents between June and September of 2021. https://academic.oup.com/cid/advance-article-abstract/doi/10...