I've seen many bad patterns appearing over the years, one is converting Project Managers into Product Owners.
In my current org Scrum Masters are not involved in the recruiting of Product Owners, management assign them to the product.
It's unclear if they have any qualifications or interest in Product Ownership.

Where does the Scrum Master fit here for example?
Is coaching enough? Personally I have found it is not.

Who is responsible for ensuring the Product Owner has the skills necessary to do the job?
Where does management fit?

Cavaet: Management may not understand or be interested in Agile or Scrum either, it's unclear how they can choose a Product Owner.