As Big Tech scrambles to meet EU rules, investigations seen as likely

FILE PHOTO: A 3D printed Facebook's new rebrand logo Meta is seen in front of displayed Google logo in this illustration taken on November 2, 2021. REUTERS/Dado Ruvic/Illustration/File Photo

BRUSSELS (Reuters) -The world's biggest tech companies have overhauled their core platform services to comply with EU rules forcing them to play fairer with rivals but will likely face investigations ahead amid criticism their efforts may have fallen short.

The Digital Markets Act (DMA) is one of the most comprehensive regulatory actions to rein in so-called "Big Tech" - Google, Apple, Amazon, Microsoft, Meta and TikTok owner ByteDance - and is expected to reshape the global technology industry after decades of unfettered growth.