Hi, @devrap!
Before anything else, as a kind reminder, normally, according to our forum guidelines, we encourage users to create their own threads even if they believe they’re encountering the same issue as the thread-starter. However, I’ll go ahead and address your concern here.
The reason why you’re seeing this notification is that WooCommerce has had updates since the last version of the WooCommerce PayPal Checkout Gateway was released. For plugins like the WooCommerce PayPal Checkout Gateway, the “tested up to” numbers are only changed when a new version of the plugin is released.
In other words, WooCommerce PayPal Checkout Gateway doesn’t have an explicit notification/flag that it has been tested with WooCommerce 5.0 yet, but when the next update for it is released, it will be changed to show that it matches the current WooCommerce version.
I hope this helps clarifies things a bit!