Hi Marco,
Yes, you can try this way:
1 - Go to Admin panel > Extensions > Modules > create a new custom HTML module and add the iframe code above. (Remember to disable the Default Editor in Global Configuration first as it will strip out this iframe tag)
2 - Edit builder page > select a text field > clone it to have a new one: https://prnt.sc/tbiwuu
Then change the 'Text' type to "Widget"
3 - Hit the settings icon >> and choose 'Module' content type and select the module you created in 1st step: https://prnt.sc/tbixwx