Progress isn’t always linear. In fact, unless you’re a novice lifter, progress may be fairly stagnant at times. You’re not always going to be blessed with noobie gains. The kind of gains someone makes when they just start lifting and can get basically get bigger just by looking at a set of dumbbells.
The longer you train, the harder it is to see progress. And as you mature into your training age, the more important the details of your training become to elicit adaptation.