Hi
https://aka.ms/HybridWizard is listed to work for Exchange 2019.
To note, Exchange is free in such scenario, not the server itself, which need licensing to be formatted/activated.
Does the Exchange hybrid server in my on-premises organization require an Exchange license?
Yes. You need to license your hybrid server when you configure a hybrid deployment. The HCW is now able to detect and license your designated on-premises Exchange 2013, Exchange 2016, or Exchange 2019 hybrid server for free without going to a separate web site or calling Microsoft support.