Released: July 2021 Exchange Server Security Updates

Needed some clarification here is it mandatory to install the Exchange 2019 CU10 to address July Security Update and https://support.microsoft.com/en-us/topic/description-of-the-security-update-for-microsoft-exchange-server-2019-2016-and-2013-april-13-2021-kb5001779-8e08f3b3-fc7b-466c-bbb7-5d5aa16ef064 in this article it says "Important: Please install the May 2021 security update. That update supersedes this security fix. For more information, see the following Exchange Team Blog article: https://techcommunity.microsoft.com/t5/exchange-team-blog/released-may-2021-exchange-server-security-updates/ba-p/2335209 . In this case do we still need to install (KB5001779)....? Even if we have installed (KB5003435) which was released in May 2021...?