I think this can be written or not, and there is no harm in writing it. Don't talk about you now. Some people who work in enterprises have their own online stores, which they usually take care of when they have nothing to do. It's also a part-time job.

And you are looking for a sales job, which should be good, because you can make money, which shows that you have this ability.

As for why there are not many companies that contact you, I feel that there may be something wrong with your resume, or you are unlucky. I suggest you submit more resumes of several units.