Assistance with wc-add-to-cart-variation/wc-variation-selection-needed

Hey all,

I realize this is probably out of scope but this y'all were so helpful last time I figured I'd ask again :)

On my store there's a standard WooCommerce buy now/checkout button on the product page. On page load variations need to be selected before a customer can checkout. The message for this is coming up no problem. I think either wc-add-to-cart-variation/wc-variation-selection-needed is being called. That said, I've also noticed with the accelerated checkout option for PayPal that this message does not appear. This has confused a few users that aren't intending to pay with card (as no message ever comes up at all.) It looks like this is loaded with a PayPal iframe so I'm not sure if it's easily customized – my searching and trying so far hasn't yielded much in the way of positive results. Any idea if this can be easily added? Picture attached with more detail:

Thanks in advance for any help!