Hope you’re doing well today! Thanks for your question. Let’s get to the bottom of what you’re seeing here.
First, in your Shopify admin, can you please visit Settings > General > Store currency > Change formatting and confirm that you’ve added {{ amount_with_comma_separator }} to both the HTML with currencyandHTML without currency fields? This is essential since one impacts collection pages and the other product pages.
If you’re comfortable doing so, you’re welcome to share a screenshot of your own currency settings here for comparison. Beyond that, I’d also be curious to take a look at your storefront myself to ensure I’m seeing the same difference between your product and collection pages.