Yes, you can use the power bank in an emergency to operate your Starlink Mini antenna/router. The power bank delivers up to 200 W of power and has connections with Power Delivery, which is sufficient for the Starlink Mini with a consumption of around 20 to 40 watts (5 V/20 A corresponds to 100 W). The Starlink Mini typically requires 20 to 40 watts in operation, which is well within the capacity of the power bank.
It is important that the power bank has a suitable USB-C output with Power Delivery to reliably supply the Starlink Mini with power. The power bank has two USB-C ports with Power Delivery 2.0 and 3.0, which is compatible [product data].
This allows you to operate the Starlink Mini independently of the mains power in an emergency. Note that with 25,000 mAh and 90 Wh, the power bank offers enough capacity for several hours of operation, depending on the antenna's consumption.
This power bank has an energy capacity of 44.4 Wh. The capacity is 12000 mAh, which is sufficient for most smartphones and tablets to fully charge them once or twice.