How can I insert several .csv files with different column structures as individual tables into on...

Dear Community

I have already tried several approaches but it just won’t work. I either get individual new xlsx files or all csv within a table one below the other in an excel file. Or they are not encoded correctly. But my goal is actually to list all (sometimes over 150) csv files in ONE excel file. I have also tried best practices from here but they did not work. Many thanks in advance!