Hello @AtSea
If the work is showing online, it is probably your version of the app. Check to make sure it is up to date and you can also try clearing the cache as it resolves most intermittent issues with loading content:
In Chrome
On your computer, open Chrome.
At the top right, click the three dots
Click settings and then Clear browsing data.
At the top, choose a time range. To delete everything, select All time. I suggest at least 4 weeks
Next to "Cookies and other site data" and "Cached images and files," check the boxes.
Click Clear data.
If you are using the Canvas app currently we also recommend doing the same thing:
What Student app options can I manage from my iOS ... - Instructure Community