Not to jump in here, but have you tried tools like https://github.com/Budibase/budibase https://github.com/Budibase/budibase that would allow you to build both

Not to jump in here, but have you tried tools like https://github.com/Budibase/budibase https://github.com/Budibase/budibase that would allow you to build both internal and external tools.