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You can inexpensively (~$10) check if your calipers have been whacked out of calibration as frequently as you want with a gauge block or other calibration standard. If they have, you can also calibrate using the same block.

My problem with calipers is that there are three separate measuring modalities (outer, inner, depth) that can each require different zeroes as they get damaged.

There is a fourth using the back of the main head similarly to the depth probe. It can be less fiddly and less subject to wear if you don't need to get into a small space.

For some of these, like the $80/6" Shars caliper that you can get from Amazon in 24 hours (most of the time), it's not even worth dealing with recalibration. If you no longer trust it, get a new one.

and who's to say the Amazon delivery person didn't drop kick it to your doorstep?

being "new" doesn't automagically mean it is calibrated accurately

Of course, but the digital calipers I have bought are usually packaged in a way that would survive most shipping, even if dropped. That is much different than dropping them on a concrete shop floor.