Row en columns

I'm facing difficulties setting up rows and columns in the page builder. Instead of appearing next to each other, they are displayed one below the other. Additionally, the product slider for VirtueMart in the tab displays the first row with 4 products, but in the next tab, the row consists of only 1 or 2 products. I also want to be able to adjust the number of visible columns on mobile devices. Can you assist me with these issues