API on existing system bank

I have a question, in our company we have a system, developed in MySQL and Delphi, this system is developed by a company, and we have several development projects, several new systems (created within our company) are made with CakePHP, we are planning to integrate everything.

My question is as follows, is it worth trying to develop a rest layer that connects to this MySQL database using CakePHP to give returns to other applications?

Is CakePHP's conventions worth it for? Would not they be more nimble to develop in the nail or use some other ORM framework to access and read the existing database tables?