Scenario: Open Arc Pro, interact with models or geoprocessing tools & receive an annoying, but not detrimental pop-up "ExcelToSQLite64" is not working. The program still operates; however, interactions with Excel tables generates a "Microsoft Driver Not Installed" error.
You search your installed programs & find all .Net Drivers & Microsoft Access Database Engine 2016 in their proper places. Possible quick fix:
You may find that you have to do this every time that Microsoft Suite updates, which you can find on their webpage of dates of updates/availability (Builds & Versions Page). I have a sneaking suspicion that this is where the problem is generated. I don't know how long this will work, but it worked today so maybe it will work tomorrow.
Note: This fix came from the Esri Help Support, who were truly fantastic to work with. I just wanted to help you not prepare a ticket if the steps were so simple. I also want to apologize to anyone who may have posted this exact solution, it was lost 20 comments down in a thread somewhere & I didn't see it.
Reference documentation: