Seeing this error Your site doesn’t include support for the "woocommerce/product-gallery" block. You can leave this block intact, convert its content to a Custom HTML block, or remove it entirely.

This happens when you use the Product Gallery (beta) block on the single product template. Note that this does not affect the frontend.

Reproducible steps:

1. With a block theme, go to Appearance->Editor->Templates->Single product
2. Remove the Product Image Gallery block.
3. Add the Product Gallery (beta) block and save.
4. Navigate away from the Editor.
5. Come back to the Single product template and witness the block error.