@krzy19 Also, I have been researching on the internet and also talking to experts working in the crypto field. I've attached some selected answers from ChatGPT.
The information I have gathered confirms my experience and also some of what you had mentioned: the data is indeed stored on the Android Keystore that is on the private local phone device; however, when I signed up for the Wallet 5 years ago, there was a policy in place only to log in via phone pattern unlock, and not reveal the secret 12-word-key unless one went to export the data. I was not provided this information and also did not happen to export my data as I was quite happy with the wallet.
Based on my research and advice from experts I have found out that there are 2 ways to restore the data of the 12-word-key according to the answers given, including an easy way and a hard way. I would need the help of Opera to verify them and possibly troubleshoot if needed
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Firstly, since the key is still encrypted on my personal device, apparently downgrading to an earlier version using an APK mirroring should be possible to temporarily access the wallet (if the wallet data is not removed from Opera completely). This requires an APK from a trustworthy source (July 2024 or earlier), and installing it over the current one without clearing the data from it. I have no experience in this, does Opera have a publicly accessible APK link, or an APK link that could be sent to me?
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Secondly, if this doesn’t work (the wallet data is gone as a whole module) then rooting the phone and extracting it from the data file corresponding to the opera browser (exact file mentioned in the pictures) can be decrypted manually with a keystore pass that Opera should have. And it would be more difficult, but still doable.
Can you please confirm if there are any changes to the app for restoring the missing icon first? And if not, where can I get the secure APK file to use for the downgrade? Finally, if all else fails, for the manual extraction what Opera department can I get in touch with for troubleshooting the keystore pass?

On a personal note, the retrieval of my stored Bitcoin is of great importance for me. I was counting on this money as a trust fund for my student loans, and now that I'm recently graduating I need it very soon
​ I would greatly appreciate your expedited help on this matter.
Thank you!
Best,
rj