I’ve just tested it on my server with Storefront v3.8.1, WooCommerce v5.6.0, and WordPress v5.8 – both 1D and 2D barcodes seem to be displaying normally on single product pages here. Would it be possible to log in to your site to check what’s going on (my email is [email protected])? Please let me know if sharing an account is not an option, and I will continue solving it remotely.
If anyone else is interested – it looks like the problem was that an old version of our EAN plugin was installed on the site. And that old version didn’t work well with PHP v8.0. Updating EAN plugin to the latest version solved the issue.