Well, this is a smartphone. But screenshot is just screenshot, and it is always not sharp, I don't want boring photo. And this is not boring, it is an example that you can grow them in the garden. On my computer is pretty sharp. Is it something happening after I am saving them. I really don't know what is going on.Good photography begins with proper lighting and equipment.
While you can, under ideal conditions, get decent photos with smartphones, more often than not they are just snapshots. That might be OK for posting on social media & email but that's not what Stock customers pay for.
Adobe Stock customers expect the highest visual and technical quality for use in commercial projects. Posters, billboard & TV ads, high quality printed merchandise... see links below.
If you plan to be a Stock photographer, start budgeting for an entry level DSLR camera (new or used) and some lenses, filters and tripod.
https://www.techradar.com/news/best-entry-level-dslr-camera
That won't make you an instant photographer but at least you'll be on a level playing field with your competition.
Hope that helps.