I just started githab and I don't know how it works. Is there only one project in a directory?

When the repository was created and it was still clean, the HTTPS URL was visible as shown in the image below, and I was able to push it to githab from the local environment. If I put it in, I couldn't find the HTTPS URL.

However, there is a section called Projects in the upper tab where there is<>Code Issure ... etc., so you can create a new one there, so you can put multiple projects in one repository I wondered if I could enter it.
Also, as a general usage of githab, shouldn't you keep source code of the same category (language) in one directory?