Hello MentorsTools,
Thank you for using Apple Support Communities. Based on your post, links that are sent are hard to read and contact information is the same, when using Dark Mode on your iPhone 11 Pro. We'll do our best to assist.
When viewing the content, as described, it's not hard to see the text. But we see that it might be hard for some people to read with Dark Mode enabled.
Try using one of the Accessibility features, if this is troublesome for you: Adjust the display and text size on iPhone
Specifically try 'Increase Contrast' or 'Smart Invert or Classic Invert' to name a few.
If you wish to provide feedback, we'd suggest providing this directly to Apple here: Product Feedback
Hoping this helps out, take care!