When you pose your question, make sure you mention the type of tablet you’re using and that you’re in Canada, just in case those factors affect anything. Eyeballing the most recent discussions, I don’t see anything specific to Android 10.
The eBay app should be compatible with Android 10.
Sometimes brand new phones or tablets have old versions of Google Play Services and Google Play Store installed, which can prevent getting the latest version of the eBay app.