Hello @AthonyALS ,
Firstly I can see the screenshot that you shared is a pivot table of excel. So take raw data where the data will be in table format and use it in Power BI to develop report.
Secondly if you have data only in this format then you have to filter and remove that total row. Then select the month-year columns and Unpivot them in Power Query Editor to get data in a table format and then you can create your required reports.
However selection of Lab and Month still remains in slicers.
If this post helps, then please consider accepting it as the solution to help other members find it more quickly. Thank You!!