You might find old .ipa files of WhatsApp from 2016 (iOS 9 compatible). Do not bother. WhatsApp’s servers will reject any client older than 2 years. You will get a "Version Expired" error.
The UI looks modern (2024–2025 style) because the remote server renders it. The iPad 2 is just a thin client. This is the closest to an “updated” experience. whatsapp for ipad 2 ios 935 updated
Safari on iOS 9.3.5 will give you a "Browser not supported" error. You need a browser that can change its "User Agent" (the text message telling a website what device you are using). You might find old
The best working option in 2026 for old iOS devices is "Puffin Browser" or "Mercury Browser Pro." Safari on iOS 9
You get a fully updated WhatsApp experience, but your iPad 2 is just a screen.