Creating an App with multiple platform support (Shopify, Woo etc)

Hi,

So recently I have been into shopify app development, I have started a hobby project which seems to have a potential, Now I am right in middle of the project, I started building it using shopify cli, I am using PHP stack,

So basically I understand the whole part of developing the app, it was pretty straight forward, I need suggestion what if i want to extend its functionality to woocommerce as well,

right now i am just thinking out loud, I think the better way is to create a custom platform with functionality and then integrate Shopify and Woo separately, I know Woo has api and I have been a developing woo plugins so that part is easy, i guess main question is, Is it possible to add/update/delete product in shopify using a third-party platform (not shopify app) using API or some process to connect with store?

Is there any one who have developed some platform that would be available for multiple platforms (shopify & woo) and how did you do it? any suggestions?

thanks