Hello, I've made several custom Access databases, most of them in file format from office 2003.
Even if it's a little sad, there is no way to make a database compatible with "future" versions of Access as no one knows what differences will be present.
As a business professional, you have to decide what you expet from the new version and which "pay-back" you'll get from it.
If it's just to fix the compatibility from office 97 or 2003 to office 2016 or 2019, it would be cheaper to make a trick to make your current version work on today's windows 10 computers as long as it does the job you need from it.
Many companies continue using old Access databases on compatible servers, and users can just connect remotely to these servers with the remote desktop technology.
Depending on the size of your database (the amount of code that would need to be translated to new version), such a trick might be cheaper that rewrite the full application.
But if you need new features, that's another story...
Then what do you actually expect from it ?