As old Dynamics 365 certifications are getting retired, new ones have recently been introduced.

Dynamics 365 for Sales Functional Consultant Associate
Dynamics 365 for Customer Service Functional Consultant Associate

As noticed by MVP Jukka Niiranen in this blog post, new training resources for these certifications are available on Microsoft OpenEdX:
There are however more training resources available on Microsoft Learn. You can find the full list here: Power Platform Learning Resources