Is it possible to scrape a "dynamical webpage" with beautifulsoup?
It depends. If the data is already loaded when the page loads, then the data is available to scrape, it's just in a different element, or being hidden. If the click event triggers loading of the data in some way, then no, you will need Selenium or another headless browser to automate this.
Beautiful soup is only an HTML parser, so whatever data you get by requesting the page is the only data that beautiful soup can access.