Jetpack mosaic gallery not showing in live

Hi,

I have Jetpack installed along with a Storefront theme. When I use a tiled gallery with the tiled mosaic style, the page looks fine in the editor but both preview in another window and live published page shows images displayed one by one without any styling.

Here’s what I have tried:

Double checked that Speed up Image Load Times option is enabled.
Debug Jetpack tool says everything looks great.
Disabled all plugins except Jetpack, cleared cache and refreshed preview and live pages and it did not fix the lost mosaic format issue.
Switched to another theme (twenty twenty one) , cleared cache and refreshed preview and live pages and it did not fix the lost mosaic format issue.
Installed deactivate Cleaner Gallery plugin, cleared cache and refreshed preview and live pages and it did not fix the lost mosaic format issue.

I ran out of action to take and am desperately seeking advice on how to proceed. Any help would be greatly appreciated! Thank you.

The page I need help with: [log in to see the link]