No—you don’t need MB-210, MB-220, or MB-260. They’ve been retired, and MB-280 replaces them. Just follow the official MB-280 study guide on Microsoft Learn, plus practice labs and community resources.
Here are solid references for that: Microsoft Learn – MB-280 Study Guide https://learn.microsoft.com/en-us/credentials/certifications/resources/study-guides/mb-280 The CRM Ninja – MB-280 replaces MB-210, 220, 260 https://thecrm.ninja/mb-280-microsoft-dynamics-365-customer-experience-analyst/