production build module without .js from node_modules (symlink)

[GoodNew5]

Hello guys, i have problem 🙏

I have a local module which is located in node_modules, such ⤵️
cd lib-A
yarn add link:../lib-B

When another project uses it in its code in the final dist, then all files are included with the .js extension, all except those imported from node_modules

here is an example

here another one example

The only way that I have currently found for myself to fix the problem is to write in the source module with .js
then production build module will be with .js

here is an example

Can i fix that most better way?