What do you mean by Kindle 7th generation?
Amazon has at least 3 devices they attach that phrase to.
Use the first few characters of your device's serial number and this chart:
https://wiki.mobileread.com/wiki/Kindle_Serial_Numbers
to find the model distinctive nickname used at this forum.
What do you mean 'destroyed'?
It looks fine in that picture you attached.
Since it is directly connected to D-, D+ (pins 2 and 3) it must be some sort of USB, PHY chip.
Plus, keep in mind that is (well, is supposed to be) an OTG port connector.
(The connector pins, left to right, are: 5V, D-, D+, ID, Gnd in addition to the standard's interface signals, the Kindle's have a "charger source" detection on D- and D+)
Sometimes intense, transverse, lighting will pick up the identification markings.