Samsung has yet to release the stable One UI 7 update. While the build is in beta testing, currently exclusive to the Galaxy S24 series, other phones will start the preview soon. The Galaxy A55 is expected to join the beta program as Samsung uploads a beta build for the phone to its server.

Samsung A55 One UI 7 beta build is the latest to be spotted on the server. It has a build number A556EXXU6ZYB6, meaning the Korean company plans to open up the beta preview for the device. We understand a page has been created on the One UI Beta program forum.
While the page doesn’t mention One UI 7, it’s obvious as the device currently runs Android 14-based One UI 6.1. We know the next release is Android 15, which is based on One UI 7. Of course, the Galaxy A55 is eligible for the upgrade and might soon receive the stable build.
Details of the Galaxy A55 One UI 7 beta build

Samsung has created a One UI beta forum page on its community website for the Galaxy A55. While there is no mention of One UI 7, the build seen on the server suggests the update is coming soon. Also, it will be available for international models, meaning it will be available in multiple countries.
Unfortunately, we do not have an idea when the rollout will commence. Samsung has not announced a release date, but since new beta builds have been popping up on the server, we believe it will be soon. The Galaxy Z Fold 6, Galaxy Z Flip 6, and the Galaxy S23 series might simultaneously get the update with the A55.