Business react native App With Year-Long Support

I need a app development team, who can develop the app as per the requires and give me support for 1 year , for deployment and maintains especially , this is for business so its very especial for the system to be operational and if any bugs it must be fixed asap , the app will have 16 screen and admin panel also


Dev budget is 50K and support is 20K all will be paid as milestones .

You can use ai to develop not an issue but import thing is maintenance