Short answer: yes, but not for the reason it used to.
The old thinking was: Formatting the phone number with a leading zero or local formatting instead of the required international format, which breaks the link entirely. That framing is dated — search engines have gotten much better at figuring things out without hand-holding. But 'search engines can cope without it' isn't the same as 'it doesn't matter.'
What actually changed is who benefits. Pre-fill a short, specific default message relevant to the page it's placed on, rather than a generic greeting that makes the user type everything from scratch. That's less about appeasing an algorithm and more about not wasting the crawl/attention you already have.
The practical test isn't whether it's trendy — it's whether skipping it creates work for someone else later (a crawler, a future you, a user). By that test, WhatsApp click-to-chat link still earns its place.
Same question, different tool: does SERP snippet preview still matter?
WhatsApp Click-to-Chat Link Generator either way — checking takes longer to read about than to do.
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