However, the company then issued another update and removed all mentions of this chat import tool. It is likely that Telegram is still working on this new tool for now and had pushed the update accidentally.
WABetaInfo managed to play around with the feature and has detailed how it works. The tool is very simple to use. It requires one to first export their chats from WhatsApp which will be exported as a zip file. You can then open this file in Telegram via the iOS share sheet and import the chats to a conversation or group chat. All imported messages are marked as imported, with Telegram also informing users when chats are imported into a conversation.
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Will you be able to convince your friends and family to move to Telegram from WhatsApp once you are able to import your chats from the latter?[Via WABetaInfo]