Tesla only records kWh while in Drive. If you sit with the car on you will use your energy but not see it in the total. Assuming you didn’t stop and idle AND that your battery is properly calibrated (common during Covid if not charging to 90% and driving down below 30% regularly) then your battery appears to have 53.6 kWh driving capacity.
Secondly, driving battery capacity is always less than listed or charging capacity due to drivetrain and battery losses. For example, my Model 3 LR with 75 kWh listed battery capacity had 68 kWh driving capacity. I don’t know the new capacity of your battery, but assuming 68 kWh like my model 3 And that you did a true long drive test without stopping and that your battery is calibrated...then your degradation may be 22% = 1-53.6/68
you can ask Tesla to run diagnostics but they won’t even blink until you have more than 30% degradation, at least for the Model 3. You have over 100k miles on your battery. I assume you charge to 100% sometimes with the X 75D struggling for range a bit. Maybe upgrade to 100D if range is an issue?