Thanks a lot that solved it. I was using XCode 13.4.1 with error. After installing 13.2.1 uploading old archive would result in the same error, but archiving again and uploading works. So i guess it is an archive problem..

Did you figure it out ? I m stuck with only universal variant being too big

the difference is due to the assets tagged as universal in my asset catalog, so not counting for specific variant size but indeed calculated in universal...