GCP - PagerDuty Sync - not possible to specify subdomain

Hello,
In GCP monitoring -> alerting -> notifications channels, there is option to use PagerDuty Sync.
Unfortunately I can’t use subdomain with .eu suffix. I’m pretty sure it has to be there, otherwise it won’t work. Can you please confirm/deny my assumption?
Thanks!

Hi Jiri,

Thank you for reaching out to PagerDuty Customer Support!

You do not need to add the .eu suffix to the subdomain.

I hope this helps. Please let me know if there is anything else we can do.