Create a package from another

Question

I installed an npm package, but it offered almost everything I needed, but I still had to do some customizations. The problem is that, as a team working and we have the whole issue of versioning and the need to keep updating the npm packages, it turns out that every time we run the npm install, whether to initialize the project or to update the packages, these customizations are about writing.

I wanted to know if there is any way or not to need to do this initial install and take advantage of the package already with the customizations or if it would be the case to upload a new package in npm, from this package, as a customized package or the right one would be some other solution that I did not see?