Add gallery frontend app block
To display galleries, you will need to add the app block to your theme.
You can add our block to:
pages
collections
products
blog articles.
Your theme needs to be an OS2.0 theme
Open up the theme customizer (go to online store, click customize)

to add the snippet to the product page, go to the dropdown and select product -> default template (or if you have custom templates select the one you want to add it to)

Select the location you want to add it and click add block, now move it to the exact location you would want the gallery to show up.

Keep in mind, if you don't have a gallery yet, or if the product in the preview page does not have a gallery linked to it, you will not see the block, to link a gallery to a product check our creating a gallery article.
On the right side select the type of slider you want to display.
Sliders
Ideal for displaying the images big (like in the footer, or on wider locations in the theme)
Thumbnails
For showing a lot of small thumbnails, on click the post will open up in a modal

The slider looks like this

The thumbnails look like this

On thumbnail click:

Updated on: 12/01/2022
Thank you!