Best practic to create a contact for REST 2.0?

Hi all,

Is there a reason why the "create contact" endpoint call is only supported for REST 1.0 and not REST 2.0?

I am building a flow where I first "Create custom object data", and then I want to send an email to the customer I just created in that custom object. However, to send an email, I need the actual Contact ID and must first check if the contact exists. So, I either need to find the existing Contact or create a new one, which then give me the "Contact ID" in my hand, so I then can send the email.