Counterpoint Research has announced the results of its analysis of the smartphone processor market during the second quarter of 2021 (2Q2021). They indicate that MediaTek "dominated" the space for those 3 months, taking a share of over 40% for the first time. On the other hand, Qualcomm did well out of the 5G baseband sector, thanks to iPhone sales.
https://www.notebookcheck.net/MediaTek-is-found-to-have-taken-its-biggest-share-of-the-mobile-SoC-market-ever-for-the-second-quarter-of-2021.568605.0.html