We are measuring our conversion by help of a tool from a third party, therefore we were given a subdomain: [company].[Tool].com

According to facebook that verification can only be done with 1st level domains +1. In our particular case that would mean "[Tool].com", so all the users throughout the country (15.000) would have to verificate, but how should that be possible?

According to facebook advertisements without verificated domains can be stopped, is that right?

According to facebook 8pixel events are no longer possible, does that refer to the top level domain [Tool].com or [Company].[Tool].com? Best regards, Stefan