How to apply changes to dey-digi-qt image, where i can find the bb files of dey-image-qt

I dont find the dey-image-qt recipe to apply my changes for my custom board. can anyone help ? also the corresponding *.bb files are not in the workspace.

What is the Digi part number for the device you are working with?

I am working with the board with the serial Number : 30016232-03_A.
Thanks for the support

is this what you have? https://docs.digi.com/resources/documentation/digidocs/pdfs/90002465.pdf

I have the same board but with the Connect Core 8MN 1G-8G-W-BT.
guess the right part Number is 95022475 B

I would suggest looking at the documentation at Digi ConnectCore 8M Mini Support Resources