The OnePlus 7 got its first update last week - OxygenOS 9.5.4 - which came with DC Dimming, Fnatic Mode, and April 2019 security patch. Now OnePlus is rolling out another update for the phone - OxygenOS 9.5.5. The new build weighs 125MB in size and brings in improvements to the camera as well as the Nightscape Mode. It also bumps up the security patch level to May 1, 2019, and includes some general bug fixes. You can check out the full changelog below: OnePlus hasn't officially announced details on the rollout of OxygenOS 9.5.5 at the time of writing this, but it's safe to say that...
Source: https://www.gsmarena.com/oneplus_7_oxygenos_9_5_5_update-news-37535.php