There are not many companies that would be engaged in the development of this level. But if you think about developing app, choose proven companies anyway. Then you need to contact companies that have a huge set of technologies.
It is vital to consider when you order the development of an application so that the company can take advantage of a stack of technologies that will ensure the stable operation of your application. Many companies take on application development without owning a specific stack of applications. What is app stack
https://owlab.group/our-blog/post/what-is-app-stack-and-its-benefit is described well on this site. The company you choose must possess considerable skills.