Hello, I'm Thileep, I'm happy to help you!
Right-click on an empty space on your desktop. Hover over View in the context menu.
Make sure Auto arrange icons is unchecked. Also, uncheck Align icons to grid if you want complete freedom to place them anywhere.
Arrange your icons as desired --they should now stay in place.
I hope this information helps. Please let me know if you need further assistance. Thank you!
Regards
Thileep