To make it short:
I lost access to my blockchain app.
I mistakenly clicked on "Forgot Blockchain" in the app because I thought that I could somehow restore my pin there.
But then it turned out that the button removes the wallet from the app.
I don't have email access (don't know the email anymore).
I do not have a wallet ID.
I don't have a recovery password / seed.
I only have a wallet receiving address and more or less the screen pin.
I never did backup / cloud etc.
What brings me hope is that I have the smartphone on which everything was done, registration / login etc.
Could it be that it was saved somewhere and that the data can be mirrored?
It is always said that just "deleting" does not really delete a file and that you can still find it in the hardware and read it out with software.
Smartphone:
Huawei HRY-LX1.
android version: 10
On-screen keyboard: Microsoft Swiftkey
Forgot login data, do not make a backup, press something "accidentally".
A lot comes together… No, you can no longer access your blockchain if you have absolutely nothing that somehow identifies you as the account owner…
You have to be extremely careful with a wallet. Once deleted, it is usually a total failure. But it also depends on the wallet you used, your account may still exist somewhere online.