Extracting External MS SQL Database

Hi, would like to know,

I have a requirement to develop web using PWA, so I choose WordPress for the content.
But another additional requirement is to pull service to fetch the data (from external MS-SQL database).
I already have given lobal database access for the specific table, but try to us WPDATATABLE, but unable to do so…is there any support or custom build I can hire to help fix this…maybe special plugin or scripting required.