I just finished the course Common Chess Patterns by Benedictine on Chessable. It came with 779 well-composed exercises focusing on spotting these foundational tactical patterns in no time and solidifying that fundamental pattern recognition skill.
Although I’ve been doing my daily dose of tactics without any pause over the last two years, some of these exercises showed me that there are some holes in my pattern recognition, and with some positions, I needed longer than expected. What I liked about the course is that the author decided to remove all the pieces on the board that aren’t needed to benefit from the exercises, training these important basic patterns.
I highly recommend this course to all who consider themselves on the verge of becoming beginners or intermediate players and want to test their basic pattern recognition ability.
In my opinion, for $9.99, buying this course it's worth it.