Hi there!
Thanks for your query.
Your main component area occupies the whole space as it is set 12 columns grid. This is why the right column moves below. Here is a screenshot that may explain the issue:
https://prnt.sc/26wavak
If you decrease the main component area column from 12 to 8, then it will let the right column be on the right as it occupies 4 columns grid.
https://prnt.sc/26wao95
Please be noted that the sum should be 12 in total as it is based on bootstrap! You can change/modify your grid from the row settings in the layout builder of your Template Options.
https://prnt.sc/26wbr1j
https://prnt.sc/26wbof5
Here is related information:
https://www.joomshaper.com/documentation/helix-framework/helix-ultimate-2/layout-builder
Best Regards