Pause the noise for a moment: Alphabet's results have nothing to do with the realization of the TikTok event.
The simplest thing is to see TikTok's announcement as a fact already concrete by its very existence.
Licenses, artist participation, or sponsors are the real factors of materialization, not the profits of a competitor.
For example, if the US advertising market conditions were generally declining, TikTok's announcement would be concrete even if Alphabet's results were negative.