Strongbox is currently only available on iPhone, iPad and Mac. It is not available on Android, Windows or Linux. It is still possible to open and edit your Strongbox database on these other platforms however.
Strongbox uses open source file formats for your databases. This means that any app that supports these formats should be able to open and edit your database files.
Your database will either be in the KeePass (.kdbx) or Password Safe (.psafe3) format.
For KeePass databases, we usually recommend KeePassXC. You can also find many other apps here:
For Password Safe databases, here is a short list of compatible apps: