Good Day Ketan, another support agent (?) replied to my request on your website’s support chat, with the following message:
Hello,
Actually there is a inline setting but don’t worry please use the below CSS.
.wpostahs-fusion-flex .fusion-builder-row {margin: 0 auto !important;}
Copy above css and paste in your custom css area.
So that seems to work, so my issue is resolved. Thank you!