Uh huh. What are you seeing?
So your observation is this ship has capability to carry 53 foot containers so it is not militarily useful? That does not seem credible.
Again though the main sealift support will come from the MSP enrolled ships in the Non-Jones Act eligible US Flag fleet. The Phillyship announcement says these are Jones Act container ships.
The system seems to have some depth. Start with the MSP ships then tap JA eligible as needed. Look 3600 TEU capacity is more of a downside than have 53 footers capability. But if the overall required capacity was such wouldn’t a war planner make use of that?