Tab are not displaying the same size on powerpoint export slides. It happen on random slides. It only covers about 1/4 of the slide.
Do you mean the table visual display in different size after exporting to PowerPoint? Would you please share screenshots before and after exporting?
Besides, pages in PowerPoint are always created in the standard 9:16 size, regardless of the original page sizes or dimensions in the Power BI report. What's your Page size defined on Power bi side?
Best Regards,Qiuyun Yu