I had this problem too.

SSDT is a 32-bit application, so you must register Microsoft.ACE.OLEDB.16.0 32-bit on your system. So download 32-bit accessdatabaseengine.exe from here https://www.microsoft.com/en-us/download/details.aspx?id=54920.

Then run CMD as administrator and goto downloaded accessdatabaseengine.exe folder by cd command like this:

C:\Users\RAHIMY> cd C:\Users\RAHIMY\Downloads

After all, run this command and wait a moment:

C:\Users\RAHIMY\Downloads> accessdatabaseengine.exe /quiet

Now restart your SQL Server Management Studio and now you can import your Excel files from SSMS (Right click on your Database->Tasks->Import Data...).