Selenium Python 3.7.4 - Series of Checkboxes can't be found by xpath on type and name

I'm trying to develop a bot that automatically handles the deletion of various posts from a website. I have stumbled across a major problem which does not allow me to proceed any further.

The page I've achieved to open presents various checkboxes with the following input:

<input type="checkbox" name="ids[]" value="305664759" onclick="toggleDeleteButtons()">

What I have to do is check simultaneously each checkbox and then click on delete button. Then a popup will appear, where I have to click "Delete" with the following input:

<input id="btnDelAds" class="button" href="javascript:void(0)" onclick="document.manageads.cmd.value='del';if (submit_batch_delete()){document.manageads.submit();}else{closeDialogDelete();}">

And then another popup will appear for confirming, but that's another problem. In fact, the troubles come when I try to find the checkboxes.

This is the code for handling the first part of the site, and findind the checkboxes:

from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver.common.keys import Keys

#HANDLING ACCESS
email = "somemail"
password = "somepass"
driver = webdriver.Firefox()
driver.get("https://www.somesite.it/account/manageads")
login_field = driver.find_element_by_id("login_email")
login_field.clear()
login_field.send_keys(email)
login_field = driver.find_element_by_id("login_passwd")
login_field.clear()
login_field.send_keys(password)
login_field.send_keys(Keys.ENTER)

#HANDLING DELETE OF POSTS
while True:
    try:
        elem = driver.find_element_by_xpath("//input[@type='checkbox' and contains(@name, 'id')")
        print("Found")
    except NoSuchElementException:
        print("End")
        break
    elem.click()

(I've censored site url and credentials)

print("Found") clause is obviously not executed. The idea was to check consecutively every checkbox, probably I've done this in the wrong way.

What I get instead is "END" in console. Any help will be strongly appreciated. Thanks in advance.