Thank you for your quick response once again. Final question before I decide how to proceed. In the case that malwarebytes did pick up the spyware/stalkerware in the past, and I clicked "remove/delete/quarantine" option that Malwarebytes gives for critical issues; would there still be traces of the app (let's say, if they left undeleted folders) or packages etc that your team of researchers would still be able to use to determine if there was the existence of such apps?
I am likely to go this route anyways, but I just wanted to get a better understanding on how reliable the final results would be.
Thank you so much for your time ncar.