Further to Dram’s comments, I see that you have placed your images inside Div Block 35. You can treat this element as a ‘wrapper’ for your images.
Change the element settings for ‘Div Block 35’ as follows:
Flex Item - Expand
Display - Flex
Flex Layout - Justify: Space Around
This should give you the desired visual look you are after.
Using a wrapper for the images allows you to change the Flex direction for the images for different viewport - namely mobile portrait.
Hope that helps.
Regards,
Keiran
Image showing the settings: