Criminal Law Questions? Ask a Criminal Lawyer.
At this point you are within your rights to file a wrongful seizure of property claim to get your property back. 2 years is more than enough time to charge you with anything.
Although Texas law is silent to a specific time frame, there are still limitations. Here is a great article on the subject. http://www.austincriminaldefenderblog.com/lawyer-discussion/sure-you-want-that-property/
If you are not interested in obtaining it back, then yes you are right it could force them to get more aggressive in their investigation to justify that the investigation is pending before the judge.
That makes sense. I might have a local criminal defense attorney reach out to them about seeing if that personal data can be retrieved for you. I would contact an attorney who has a relationship with the local prosecutors i.e. a former prosecutor.
Let me know if you have any additional questions otherwise a positive rating would be appreciated.