The role of a product manager calls for multiple product management skills, especially in the tech industries. While having a technical background would be beneficial, your skills will probably not undergo a drastic change as a product manager.
Many industries consider technical background to be one of the most important product management skills. Though this is not a mandatory criterion for most companies offering product manager roles, it could easily be a competitive advantage for the candidate.
You will also most likely not have complete control over the technical design. You might be able to influence the decisions of the engineers in this regard, but you won't have the authority to mandate it.
You might have a better understanding of how the product should support the business needs from a technical standpoint, which makes your technical background useful among other product management skills. While each technical skill required to build a product can be considered an individual tree, a product manager's role can be considered similar to that of nurturing a forest. As a product manager, it is your duty to see the bigger picture. Technical skills will be helpful in the journey, but you can't rely on it solely as you will have many other responsibilities to handle.