This is not common at 3 years and 46K and I hope that they warranty it for you. Shocks can be replaced without alignment but hopefully they'd at least check it for you - it's 5 minutes of effort.
But note that the front and rear shocks are completely different designs from completely different assembly lines and were built at different times with no common shared components, yet you somehow had all of them fail at exactly the same time. You might face some pointed questions.
Also note that all shocks leak a little bit and there is an "acceptable" amount that automakers use for warranty authorization. This chart is from Lexus but Tesla surely uses something similar:
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