To delete your Gnosis App account, you'll need to follow some steps in the Gnosis App.
Open your Gnosis app and go to the More tab
Go to "Advanced"
Click on "Delete my account"
Once you click it, it starts the deletion process :
Make sure to read the details regarding the deletion process
After confirming the details by checking the checkmarks, you will be able to click to delete the account.
Note: As Gnosis App functions as an aggregated service, requests for data deletion must also be submitted directly to the support teams of Monerium and Gnosis Pay.
You will be requested to use your passkey to verify ownership
Finally, your account will be deleted. It can't be recovered.