This is something that produces mixed results for people, but it's worth giving it a shot if you have fingerprint sensor recognition issues. The Galaxy S10/Note 10 lets you enroll multiple fingerprint profiles at once, of course, but nothing says that you can't enroll the same fingerprint twice to increase the amount of coverage you get of the single digit.
Try enrolling your fingerprint once while holding the phone as you would throughout the day, and enroll the same print again while the phone is sitting flat on the table or being held in a different way. There's a considerable difference in how your thumb contacts the screen when you change your arm and hand angle, and this can be enough to trip up the fingerprint sensor if you only enroll that print once.
