iOS 13.4 has the release date for iPhone and iPad revealed before it takes place, as has happened in the past, and just as in previous situations, we are talking about a disclosure that comes from Apple's partners, so we should whether the information is valid.
iOS 13.4 would be launched tomorrow by those from Apple, the information coming from an Apple partner that has a mobile payment service called Ali Pay, which will be integrated into Apple Pay starting from March 18, so the launch should take place tomorrow
iOS 13.4 officially brings the integration of Ali Pay into Apple Pay, and this is because at the moment the mobile payment system of those from Apple does not have the platform available, so an update is needed in order for support to be offered for customers in China.
iOS 13.4 will be released on March 17 by Apple for Ali Pay integration to be available from March 18 in China, and Tuesday is a regular day for iDevice update releases, so again we're talking about a match with what we've seen and previous.
iOS 13.4, if it will be released tomorrow, then it will be available for installation sometime during the evening, most likely around 20:00, so you will not be able to install it until then, but even after the release it is not recommended to install it for that there may be problems.
