Selenium - clicked windows does not open & no error - selenium

Question

My code:
#Open Website
profile_path = r'C:\Users\XXX\AppData\Local\Mozilla\Firefox\Profiles\ndefault-release'
options = Options()
options.binary_location = r'C:\Program Files\Mozilla Firefox\firefox.exe'
options.set_preference('profile', profile_path)
options.add_argument("--no-sandbox")
service = Service(r'C:\Users\XXX\geckodriver.exe')
driver = Firefox(service=service, options=options)
# declaration of variables
name = "x"
suffix = "x"
start_number = 1
end_number = 1000
for i in range(start_number, end_number):
driver.get('https://www.bauhaus.info/gewinnspiel')
time.sleep(3)
#driver.find_element(by=By.XPATH, value=f"/div/div/div/div/div[2]/div/div[2]/div/div/div/button").click()
element = driver.execute_script("""return document.querySelector('#usercentrics-root').shadowRoot.querySelector("button[data-testid='uc-accept-all-button']")""")
element.click()
time.sleep(1)
driver.switch_to.frame(0)
time.sleep(1)
driver.find_element(by=By.XPATH, value=f"/html/body/section/div/div/div/div[2]/div/div/div[1]/div[1]/form/div/div[3]/a").click()
time.sleep(2)
If i add the xpath in the firefox console i get the right output:
Array [ a.btn.btn-primary ]
But the white windows does not open, only if i click manually on it:

Answer 1

shadow_host = driver.find_element(By.ID, "usercentrics-root")
if driver.name == 'firefox':
shadow_root = driver.execute_script('return arguments[0].shadowRoot.children', shadow_host)[0]
else:
shadow_root = shadow_host.shadow_root
WebDriverWait(shadow_root, 30).until(EC.presence_of_element_located((By.CSS_SELECTOR, "button[data-testid='uc-accept-all-button']"))).click()
iframe = WebDriverWait(driver, 30).until(EC.presence_of_element_located((By.CSS_SELECTOR, "iframe[title=' blackweekgewinnspiel']")))
driver.switch_to.frame(iframe)
canvas = driver.find_element(By.CSS_SELECTOR, "canvas")
driver.execute_script("arguments[0].scrollIntoView(true);",canvas)
driver.execute_script("arguments[0].click();", canvas);
driver.switch_to.default_content()
Two points to note:
the Accept Cookies popup is in shadow DOM, for which Chrome + Selenium 4.1 has a ready made solution, but Firefox will also work with Selenium 4 via execute_script.
the roulette wheel is in an iframe, so must switch there before clicking.