Microsoft seems quite excited about the new PowerApps Component Framework (PCF).

“(PCF) is a significant step towards empowering [third]-party developers to build compelling visual components using the same framework which Microsoft team uses,” stated Microsoft’s Hemant Gaur, product owner for the PowerApps component framework, in a blog post. “The framework enables developers to create fully custom components for use across the full breadth of PowerApps capabilities.”
— https://msdynamicsworld.com/story/beyond-citizen-developer-why-pros-see-promise-microsofts-powerapps-component-framework