WooCommerce

I'm looking to build an eCommerce website and seeking advice from professionals on the most reliable tech stack that I can use. Currently, the website is built on top of WordPress with WooCommerce, but the company has grown up, and evidently, the number of products have been increased. The site needs a fresh code because WordPress doesn't make it anymore.

The stack I'm most familiar with is PHP + Symfony + MySQL + Apache HTTP Server or NGINX. Headless eCommerce is the one I'm looking for, because of the huge complexity, it would be great to separate the backend from the frontend. Not sure about CMSs, because they had a huge amount of functionality that the application doesn't need. I've been looking also at PrestaShop, it seems ok, but not sure about customization and front-end integration. As a custom solution, I have found Sylius or Aimeos for the backend, but I'm not too sure about a frontend stack.

Could you please give some suggestions about the frontend stack and if the ones for the backend are ok?

We are a consultation service provider, we use WooCommerce as our financial management system, our business model based on packages, you buy a package with X number of consultation, buying a package allows you to benefit from this package X times, we having our own custom plugin to manage this process, but we are looking to enhance our implementation by using a supported plugin or better system design, but we are struggling to find a plugin that customizes WooCommerce to match our business model, do you know any similar plugins? If not we are open to any system design ideas