[rswail]

Didi and Grab weren't M&A to Uber, Uber in their cities/countries were acquired by Didi/Grab via stock.

[Jommi]

How is that different? You could just rephrase what you said to say:

Uber purchased non-trivial shareholder positions in their global competitors.

For example the case in Russia was a quite literally a merger. Uber and Yandex made a joint venture, which operates in Russia and some former eastern bloc countries.