No, you cannot create a page within a Canvas course and then have it auto-populate to other courses. However, there are some options:
Note that your global Canvas account has a place for you to upload your photo, profile, and so on. Just click on the circle in the upper left-hand corner of your screen. All of your students in all of your courses will be able to see what you upload there.
If you also want a separate page, you may want to create one in a development course shell ("sandbox course"). Then you can "import" the page into each individual Canvas course. Note that "importing" is the way to go, not copying and pasting.