It looks old (pre-dark mode, pre-reaction emojis), but texting works if servers allow.
Filter the results by compatibility if possible, or look for older apps that still support iOS 9. whatsapp for ipad 2 ios 935 updated
Legacy tools like Phœnix allow you to jailbreak the iPad 2 directly. Access Cydia: Open the Cydia app store. It looks old (pre-dark mode, pre-reaction emojis), but