I noticed similarly, with a game that only takes about 10 minutes - "snacking" is a great way to put it. If I remove the game, I notice that I do have a ton of extra free time, but unfortunately it doesn't seem to really motivate me towards other tasks.

Consider finding something else to "snack" on, digitally speaking. My wife and I are learning Italian (online lessons with a native speaker, presently) in order to be able to speak the language for a trip next year (hopefully, who knows with this chaotic world when it will actually happen, it's been postponed for two years already). Instead of games, I spend my digital snack time on Italian practice (some recommended videos from the teacher, flashcards, etc.).