Both of those sites work fine for me on an iPad, in both portrait and landscape mode. iOS/iPadOS let you choose to view the desktop site (the browser lies about

Both of those sites work fine for me on an iPad, in both portrait and landscape mode. iOS/iPadOS let you choose to view the desktop site (the browser lies about the user agent), but even in mobile mode those sites work fine. I rarely encounter web sites that don't work on mobile -- for some time now "mobile first" represents the best practice for web site design, because of smartphones. Maybe something wonky in your setup, I don't know, but as a full-time tablet user I don't see the issue you report.